CriticalCVE-2026-96951

Windows Shell Security Feature Bypass Vulnerability (CVE-2026-96951)

Published 13.10.2026Last modified 16.10.2026In CISA KEV since 13.10.2026Sources: Msrc Update Guide, CVE.org, pwn.watch, BSI

Actively exploited
Source: VulnCheck KEV (opens in a new tab), CIRCL Sightings How we classify

What is affected, what to do

Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.

The vulnerability is being actively exploited; treat it as a priority. Update Microsoft Outlook.com to version 20260925.100, Microsoft Windows 10 Version 1607 to version 10.0.14393.9612, Microsoft Windows 10 Version 1809 to version 10.0.17763.9376. Immediate actions, mitigation and detection rules are in the runbook below.

Affected: Microsoft Outlook.com lt 1.0.0..20260925.100
Microsoft Windows 10 Version 1607 lt 10.0.14393.0..10.0.14393.9612
Microsoft Windows 10 Version 1809 lt 10.0.17763.0..10.0.17763.9376
Microsoft Windows 10 Version 21H2 lt 10.0.19044.0..10.0.19044.7807
Microsoft Windows 10 Version 22H2 lt 10.0.19045.0..10.0.19045.7807
Microsoft Windows 11 version 23H2 lt 10.0.22631.0..10.0.22631.7652
Microsoft Windows 11 Version 24H2 lt 10.0.26100.0..10.0.26100.9711
Microsoft Windows 11 Version 25H2 lt 10.0.26200.0..10.0.26200.9711
Microsoft Windows 11 version 26H1 lt 10.0.28000.0..10.0.28000.3231
Microsoft Windows 11 Version 26H2 lt 10.0.26300.0..10.0.26300.9711
Microsoft Windows Server 2012 R2 lt 6.3.9600.0..6.3.9600.23470
Microsoft Windows Server 2012 R2 (Server Core installation) lt 6.3.9600.0..6.3.9600.23470
Microsoft Windows Server 2016 lt 10.0.14393.0..10.0.14393.9612
Microsoft Windows Server 2016 (Server Core installation) lt 10.0.14393.0..10.0.14393.9612
Microsoft Windows Server 2019 lt 10.0.17763.0..10.0.17763.9376
Microsoft Windows Server 2019 (Server Core installation) lt 10.0.17763.0..10.0.17763.9376
Microsoft Windows Server 2022 lt 10.0.20348.0..10.0.20348.5761
Microsoft Windows Server 2025 lt 10.0.26100.0..10.0.26100.33650
Microsoft Windows Server 2025 (Server Core installation) lt 10.0.26100.0..10.0.26100.33650
Fixed in: Microsoft Outlook.com 20260925.100
Microsoft Windows 10 Version 1607 10.0.14393.9612
Microsoft Windows 10 Version 1809 10.0.17763.9376
Microsoft Windows 10 Version 21H2 10.0.19044.7807
Microsoft Windows 10 Version 22H2 10.0.19045.7807
Microsoft Windows 11 version 23H2 10.0.22631.7652
Microsoft Windows 11 Version 24H2 10.0.26100.9711
Microsoft Windows 11 Version 25H2 10.0.26200.9711
Microsoft Windows 11 version 26H1 10.0.28000.3231
Microsoft Windows 11 Version 26H2 10.0.26300.9711
Microsoft Windows Server 2012 R2 6.3.9600.23470
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.23470
Microsoft Windows Server 2016 10.0.14393.9612
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9612
Microsoft Windows Server 2019 10.0.17763.9376
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.9376
Microsoft Windows Server 2022 10.0.20348.5761
Microsoft Windows Server 2025 10.0.26100.33650
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33650

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Metrics

8.8

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v3

8.8

CVSS v3

Severity High on the scale from 0 to 10.

Source: Msrc Update Guide, CVE.org, pwn.watch, BSI

9.8 %

EPSS score

Moderate — model estimates 1-10% exploitation likelihood.

Source: FIRST EPSS, percentile 95.5

Show all metrics

Severity: Critical
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 247.01 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: actively exploitedSource: VulnCheck KEV (opens in a new tab), CIRCL Sightings How we classify
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 8.8 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 8.8
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 9.8 %; Moderate — model estimates 1-10% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 95.5; Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: Actively exploited
Published: 13.10.2026
In CISA KEV since The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: 13.10.2026
CISA assessment (SSVC): Exploitation: active · not automatable · Technical impact: total; Source: CISA Vulnrichment, as of 8 October 2026
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-77

Response and mitigation

Why act now?

Prioritisation rationale

This flaw is reachable over the network without authentication and only needs a user to open a crafted file or link. That makes it a natural component of phishing and drive-by chains that suppress Mark-of-the-Web or SmartScreen prompts to get a follow-on payload executed. Its statistical exploitation likelihood is moderate rather than top-tier, and CISA reports no known ransomware use. KEV listing nonetheless confirms real-world attacks. Organisations with a large email- and internet-facing workforce should rate it high and fast-track it within the current patch cycle. Isolated OT or kiosk systems without interactive users can follow at lower priority.

01
Runbook step 1
Immediate response (0-24 h)
- Push Microsoft security updates to at least these builds: Windows 10 1607 → 10.0.14393.9612, Windows 10 1809 → 10.0.17763.9376, Windows 10 21H2 → 10.0.19044.7807, Windows 11 23H2 → 10.0.22631.7652, Windows 11 24H2 → 10.0.26100.9711, Windows 11 25H2 → 10.0.26200.9711. KB numbers are not supplied in the context. The patch is available from the vendor, so look up the KB ID in the MSRC advisory for CVE-2026-96951.
- Windows 10 22H2: the source data is inconsistent. The affected range starts at 10.0.19045.0, but the listed fixed build is 10.0.19044.7807. Confirm the correct target build, likely on the 19045 line, in the MSRC advisory before building compliance queries on it.
- Query patch state through your inventory tooling (Intune, MECM, Defender Vulnerability Management), e.g. DeviceTvmSoftwareVulnerabilities | where CveId == "CVE-2026-96951". Patch mail- and browser-heavy clients first, then terminal servers and jump hosts.
- Outlook.com is a service Microsoft has fixed server-side (version 20260925.100). No customer action is needed, but record it for your NIS2 evidence trail.
- Until rollout completes, send a targeted user advisory: do not open unexpected shortcut, internet-shortcut or archive files from email or downloads. Exploitation requires user interaction.
02
Runbook step 2
Mitigation layers
- Mail/web gateway: Block .lnk, .url, .scf, .library-ms, .searchConnector-ms and .website attachments. Apply the same block to files inside ZIP, ISO, IMG and VHD(X) containers. Quarantine password-protected archives.
- Network segmentation: Deny outbound SMB (TCP 445/139) and WebDAV to internet destinations at the perimeter. Shell bypass chains commonly fetch payloads via UNC or WebDAV paths. Disable the WebClient service via GPO wherever there is no business need.
- Endpoint hardening (Defender ASR): Set these rules to Block: "Block executable content from email client and webmail" (BE9BA2D9-53EA-4CDC-84E5-9B1EEEE46550), "Block JavaScript or VBScript from launching downloaded executable content" (D3E037E1-B0C8-4C10-A1D5-74A5BB2A3A90) and "Block execution of potentially obfuscated scripts" (5BEB7EFE-FD9A-4556-801D-275E5FFC04CC).
- Application control: Use WDAC or AppLocker to restrict execution from %USERPROFILE%\Downloads, %TEMP% and mounted ISO volumes. Deny mshta.exe, wscript.exe and cscript.exe to standard users.
- IAM/least privilege: Remove local admin rights so that a bypassed security feature does not translate straight into host compromise. Restrict privileged accounts to hardened admin workstations without mail or browser access.
- Configuration: Enforce SmartScreen and Mark-of-the-Web. Ensure the GPO "Do not preserve zone information in file attachments" is set to Disabled so zone information is kept.
03
Runbook step 3
Detection rules
- Sysmon EID 1 / Security EID 4688: Watch for explorer.exe directly spawning cmd.exe, powershell.exe, mshta.exe, rundll32.exe, wscript.exe or conhost.exe --headless with URLs, UNC paths or Base64 in the command line. KQL: DeviceProcessEvents | where InitiatingProcessFileName =~ "explorer.exe" and FileName in~ ("cmd.exe","powershell.exe","mshta.exe","rundll32.exe","wscript.exe") and ProcessCommandLine has_any ("http","\\\\","-enc","FromBase64")
- Sysmon EID 11 / EID 15: Watch for .lnk or .url files written to Downloads or Temp, especially files dropped by mail or browser processes that have a missing or unusual Zone.Identifier stream. This pattern indicates an MotW bypass.
- Network telemetry (Zeek/Suricata): Watch for outbound SMB (TCP 445) to external IPs and HTTP PROPFIND/OPTIONS requests with User-Agent Microsoft-WebDAV-MiniRedir. In Zeek http.log, filter on method == "PROPFIND" with an external id.resp_h.
- SmartScreen/Defender logs: Flag execution of downloaded files with no preceding SmartScreen event (channel Microsoft-Windows-SmartScreen/Debug). Correlate with ASR audit and block events (Defender Event IDs 1121/1122).
- Sigma shape: logsource: process_creation, ParentImage|endswith: '\explorer.exe', Image|endswith: ['\mshta.exe','\powershell.exe','\cmd.exe'], CommandLine|contains: ['http','\\\\']. Add a filter for legitimate logon scripts.

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: Actively exploited: treat the vulnerability as a priority in vulnerability handling under Art. 21(2)(e) NIS2. If it is exploited in your environment, check the reporting obligation under Art. 23 (early warning within 24 hours).
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: Since 11.09.2026, manufacturers of affected products with digital elements must report actively exploited vulnerabilities under Art. 14 CRA, with an early warning within 24 hours via ENISA's single reporting platform.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.

Source: Microsoft Security Update Guide, cvelistv5, pwn.watch, NVD (NIST), CISA KEV Catalog, CVE.org (MITRE), BSI WID Portal, BSI CSAF

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Microsoft	Outlook.com	`1.0.0 – < 20260925.100`	`20260925.100`
Microsoft	Windows 10 Version 1607	`10.0.14393.0 – < 10.0.14393.9612`	`10.0.14393.9612`
Microsoft	Windows 10 Version 1809	`10.0.17763.0 – < 10.0.17763.9376`	`10.0.17763.9376`
Microsoft	Windows 10 Version 21H2	`10.0.19044.0 – < 10.0.19044.7807`	`10.0.19044.7807`
Microsoft	Windows 10 Version 22H2	`10.0.19045.0 – < 10.0.19045.7807`	`10.0.19045.7807`
Microsoft	Windows 11 version 23H2	`10.0.22631.0 – < 10.0.22631.7652`	`10.0.22631.7652`
Microsoft	Windows 11 Version 24H2	`10.0.26100.0 – < 10.0.26100.9711`	`10.0.26100.9711`
Microsoft	Windows 11 Version 25H2	`10.0.26200.0 – < 10.0.26200.9711`	`10.0.26200.9711`
Microsoft	Windows 11 version 26H1	`10.0.28000.0 – < 10.0.28000.3231`	`10.0.28000.3231`
Microsoft	Windows 11 Version 26H2	`10.0.26300.0 – < 10.0.26300.9711`	`10.0.26300.9711`
Microsoft	Windows Server 2012 R2	`6.3.9600.0 – < 6.3.9600.23470`	`6.3.9600.23470`
Microsoft	Windows Server 2012 R2 (Server Core installation)	`6.3.9600.0 – < 6.3.9600.23470`	`6.3.9600.23470`
Microsoft	Windows Server 2016	`10.0.14393.0 – < 10.0.14393.9612`	`10.0.14393.9612`
Microsoft	Windows Server 2016 (Server Core installation)	`10.0.14393.0 – < 10.0.14393.9612`	`10.0.14393.9612`
Microsoft	Windows Server 2019	`10.0.17763.0 – < 10.0.17763.9376`	`10.0.17763.9376`
Microsoft	Windows Server 2019 (Server Core installation)	`10.0.17763.0 – < 10.0.17763.9376`	`10.0.17763.9376`
Microsoft	Windows Server 2022	`10.0.20348.0 – < 10.0.20348.5761`	`10.0.20348.5761`
Microsoft	Windows Server 2025	`10.0.26100.0 – < 10.0.26100.33650`	`10.0.26100.33650`
Microsoft	Windows Server 2025 (Server Core installation)	`10.0.26100.0 – < 10.0.26100.33650`	`10.0.26100.33650`
microsoft	outlook_web	`—`	—
Microsoft	Windows	`Security App`	—

Vendors and products

Affected operating systems

Affected operating systems

Windows	microsoft	windows_10_1607	—
Windows	microsoft	windows_10_1809	—
Windows	microsoft	windows_10_21h2	—
Windows	microsoft	windows_10_22h2	—
Windows	microsoft	windows_11_23h2	—
Windows	microsoft	windows_11_24h2	—
Windows	microsoft	windows_11_25h2	—
Windows	microsoft	windows_11_26h1	—
Windows	microsoft	windows_11_26h2	—
Windows	microsoft	windows_server_2012	`r2`
Windows	microsoft	windows_server_2016	—
Windows	microsoft	windows_server_2019	—
Windows	microsoft	windows_server_2022	—
Windows	microsoft	windows_server_2025	—

Weakness classes (CWE)

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
Class
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
Entry at MITRE CWE-77

Public exploit references

Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

Public exploit references

CISA KEV Catalog	CISA Known Exploited Vulnerability (opens in a new tab)cisa.gov	actively exploited	13.10.2026

References & sources

Microsoft Security Update GuideWindows Shell Security Feature Bypass VulnerabilityVendor advisory, Patch
cisa.govknown-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96951government-resource
pwn.watchpwn.watch: Windows Shell Mark-of-the-Web bypass zero-day (CVE-2026-96951)pwn-watch
bleepingcomputer.comBleepingComputer: October 2026 Patch Tuesdaypwn-watch
malwarebytes.comMalwarebytes Patch Tuesday rounduppwn-watch
JPCERT/CCJPCERT/CC JPCERT-AT-2026-0031: Microsoft Releases October 2026 Security Updatesjpcert

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

16.10.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: active, automatable: no

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	removed	{"id":"CVE-2026-96951","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-15T22:18:16.873555Z"}	—
SSVC assessment	added	—	{"id":"CVE-2026-96951","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-08T00:00:00+00:00"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

15.10.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: active, automatable: no

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	removed	{"id":"CVE-2026-96951","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-08T00:00:00+00:00"}	—
SSVC assessment	added	—	{"id":"CVE-2026-96951","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-15T22:18:16.873555Z"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

14.10.2026Reanalysis by NVDNVD

Product mapping changed:

Microsoft Windows Server 2012 (r2)
Microsoft Windows Server 2022 (before 10.0.20348.5761)
Microsoft Windows 10 1607 (before 10.0.14393.9612)
Microsoft Windows 10 1809 (before 10.0.17763.9376)
Microsoft Windows 10 21H2 (before 10.0.19044.7807)
Microsoft Windows 11 23H2 (before 10.0.22631.7652)
Microsoft Windows 11 24H2 (before 10.0.26100.9711)
Microsoft Windows 11 25H2 (before 10.0.26200.9711)
Microsoft Windows 11 26H1 (before 10.0.28000.3231)
Microsoft Windows 11 26H2 (before 10.0.26300.9711)
Microsoft Windows Server 2016 (before 10.0.14393.9612)
Microsoft Windows Server 2019 (before 10.0.17763.9376)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Product configuration	changed	OR cpe:2.3:o:microsoft:windows_server_2012:r2::::::: cpe:2.3:o:microsoft:windows_server_2022::::::::* versions up to (excluding) 10.0.20348.5761 cpe:2.3:o:microsoft:windows_10_1607:::::::x64: versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_10_1607:::::::x86: versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_10_1809:::::::x64: versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_10_1809:::::::x86: versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_10_21h2:::::::x64: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_10_21h2:::::::x86: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64: versions up to (excluding) 10.0.22631.7652 cpe:2.3:o:microsoft:windows_11_23h2:::::::x64: versions up to (excluding) 10.0.22631.7652 cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64: versions up to (excluding) 10.0.26100.9711 cpe:2.3:o:microsoft:windows_11_24h2:::::::x64: versions up to (excluding) 10.0.26100.9711 cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64: versions up to (excluding) 10.0.26200.9711 cpe:2.3:o:microsoft:windows_11_25h2:::::::x64: versions up to (excluding) 10.0.26200.9711 cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64: versions up to (excluding) 10.0.28000.3231 cpe:2.3:o:microsoft:windows_11_26h1:::::::x64: versions up to (excluding) 10.0.28000.3231 cpe:2.3:o:microsoft:windows_11_26h2:::::::arm64: versions up to (excluding) 10.0.26300.9711 cpe:2.3:o:microsoft:windows_11_26h2:::::::x64: versions up to (excluding) 10.0.26300.9711 cpe:2.3:o:microsoft:windows_server_2016::::::::* versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_server_2019::::::::* versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_server_2025:::::::x64: versions up to (excluding) 10.0.26100.33650 cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64: versions up to (excluding) 10.0.19045.7807 cpe:2.3:o:microsoft:windows_10_22h2:::::::x64: versions up to (excluding) 10.0.19045.7807 cpe:2.3:o:microsoft:windows_10_22h2:::::::x86: versions up to (excluding) 10.0.19045.7807 cpe:2.3:a:microsoft:outlook:::::-:windows::* versions up to (excluding) 20260925.100	OR cpe:2.3:o:microsoft:windows_server_2012:r2::::::: cpe:2.3:o:microsoft:windows_server_2022::::::::* versions up to (excluding) 10.0.20348.5761 cpe:2.3:o:microsoft:windows_10_1607:::::::x64: versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_10_1607:::::::x86: versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_10_1809:::::::x64: versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_10_1809:::::::x86: versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_10_21h2:::::::x64: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_10_21h2:::::::x86: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64: versions up to (excluding) 10.0.22631.7652 cpe:2.3:o:microsoft:windows_11_23h2:::::::x64: versions up to (excluding) 10.0.22631.7652 cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64: versions up to (excluding) 10.0.26100.9711 cpe:2.3:o:microsoft:windows_11_24h2:::::::x64: versions up to (excluding) 10.0.26100.9711 cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64: versions up to (excluding) 10.0.26200.9711 cpe:2.3:o:microsoft:windows_11_25h2:::::::x64: versions up to (excluding) 10.0.26200.9711 cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64: versions up to (excluding) 10.0.28000.3231 cpe:2.3:o:microsoft:windows_11_26h1:::::::x64: versions up to (excluding) 10.0.28000.3231 cpe:2.3:o:microsoft:windows_11_26h2:::::::arm64: versions up to (excluding) 10.0.26300.9711 cpe:2.3:o:microsoft:windows_11_26h2:::::::x64: versions up to (excluding) 10.0.26300.9711 cpe:2.3:o:microsoft:windows_server_2016::::::::* versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_server_2019::::::::* versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_server_2025:::::::x64: versions up to (excluding) 10.0.26100.33650 cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64: versions up to (excluding) 10.0.19045.7807 cpe:2.3:o:microsoft:windows_10_22h2:::::::x64: versions up to (excluding) 10.0.19045.7807 cpe:2.3:o:microsoft:windows_10_22h2:::::::x86: versions up to (excluding) 10.0.19045.7807 cpe:2.3:a:microsoft:outlook_web:-:::::::

Source identifier: nvd@nist.gov

14.10.2026Initial analysis by NVDNVD

Newly listed as affected:

Microsoft Windows Server 2012 (r2)
Microsoft Windows Server 2022 (before 10.0.20348.5761)
Microsoft Windows 10 1607 (before 10.0.14393.9612)
Microsoft Windows 10 1809 (before 10.0.17763.9376)
Microsoft Windows 10 21H2 (before 10.0.19044.7807)
Microsoft Windows 11 23H2 (before 10.0.22631.7652)
Microsoft Windows 11 24H2 (before 10.0.26100.9711)
Microsoft Windows 11 25H2 (before 10.0.26200.9711)
Microsoft Windows 11 26H1 (before 10.0.28000.3231)
Microsoft Windows 11 26H2 (before 10.0.26300.9711)
Microsoft Windows Server 2016 (before 10.0.14393.9612)
Microsoft Windows Server 2019 (before 10.0.17763.9376)

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Product configuration	added	—	OR cpe:2.3:o:microsoft:windows_server_2012:r2::::::: cpe:2.3:o:microsoft:windows_server_2022::::::::* versions up to (excluding) 10.0.20348.5761 cpe:2.3:o:microsoft:windows_10_1607:::::::x64: versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_10_1607:::::::x86: versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_10_1809:::::::x64: versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_10_1809:::::::x86: versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_10_21h2:::::::x64: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_10_21h2:::::::x86: versions up to (excluding) 10.0.19044.7807 cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64: versions up to (excluding) 10.0.22631.7652 cpe:2.3:o:microsoft:windows_11_23h2:::::::x64: versions up to (excluding) 10.0.22631.7652 cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64: versions up to (excluding) 10.0.26100.9711 cpe:2.3:o:microsoft:windows_11_24h2:::::::x64: versions up to (excluding) 10.0.26100.9711 cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64: versions up to (excluding) 10.0.26200.9711 cpe:2.3:o:microsoft:windows_11_25h2:::::::x64: versions up to (excluding) 10.0.26200.9711 cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64: versions up to (excluding) 10.0.28000.3231 cpe:2.3:o:microsoft:windows_11_26h1:::::::x64: versions up to (excluding) 10.0.28000.3231 cpe:2.3:o:microsoft:windows_11_26h2:::::::arm64: versions up to (excluding) 10.0.26300.9711 cpe:2.3:o:microsoft:windows_11_26h2:::::::x64: versions up to (excluding) 10.0.26300.9711 cpe:2.3:o:microsoft:windows_server_2016::::::::* versions up to (excluding) 10.0.14393.9612 cpe:2.3:o:microsoft:windows_server_2019::::::::* versions up to (excluding) 10.0.17763.9376 cpe:2.3:o:microsoft:windows_server_2025:::::::x64: versions up to (excluding) 10.0.26100.33650 cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64: versions up to (excluding) 10.0.19045.7807 cpe:2.3:o:microsoft:windows_10_22h2:::::::x64: versions up to (excluding) 10.0.19045.7807 cpe:2.3:o:microsoft:windows_10_22h2:::::::x86: versions up to (excluding) 10.0.19045.7807 cpe:2.3:a:microsoft:outlook:::::-:windows::* versions up to (excluding) 20260925.100
Reference type	added	—	Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96951 Types: Patch, Vendor Advisory
Reference type	added	—	CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96951 Types: US Government Resource

Source identifier: nvd@nist.gov

14.10.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: none known, automatable: no

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	removed	{"id":"CVE-2026-96951","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-13T19:40:04.830018Z"}	—
SSVC assessment	added	—	{"id":"CVE-2026-96951","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-08T00:00:00+00:00"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Show 3 older changes

13.10.2026CISA KEV entry updated9119a7d8…
4 individual changes: Date Added, Due Date, Required Action, Vulnerability Name
Show 4 original changes
Individual changes of this event as published by NVD
Type Action Before After
Date Added added
—
2026-10-13
Due Date added
—
2026-10-13
Required Action added
—
2026-10-13
Vulnerability Name added
—
2026-10-13
Source identifier: 9119a7d8-5eab-497f-8521-727c672e3725

Individual changes of this event as published by NVD
Type	Action	Before	After
Date Added	added	—	2026-10-13
Due Date	added	—	2026-10-13
Required Action	added	—	2026-10-13
Vulnerability Name	added	—	2026-10-13

13.10.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: active, automatable: no

New references:

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96951

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-96951
SSVC assessment	added	—	{"id":"CVE-2026-96951","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-13T19:40:04.830018Z"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

13.10.2026ReceivedMicrosoft

CVSS V3.1: AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness type: CWE-77

Description added or changed

New references:

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96951

Show 5 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Description	added	—	Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
CVSS	added	—	AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness type (CWE)	added	—	CWE-77
Affected versions (publisher)	added	—	New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/96xxx/CVE-2026-96951.json">CVE-2026-96951</a>
Reference	added	—	https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96951

Source identifier: secure@microsoft.com

Linked advisories

Microsoft Patches Record 1,413 Vulnerabilities, Including Exploited Windows Zero-DaySecurityWeek14.10.2026
October Patch Tuesday roundup: Over 1,400 Microsoft holes to be plugged, including three zero daysCSO Online14.10.2026
Multiples vulnérabilités dans Microsoft Windows (14 octobre 2026)CERT-FR (ANSSI)14.10.2026
NCSC-2026-0422 [1.00] [M/H] Kwetsbaarheden verholpen in Microsoft OfficeNCSC-NL13.10.2026

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<a href="https://intel.neosec.eu/en/cve/CVE-2026-96951"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-96951.svg?lang=en" alt="CVE-2026-96951 – NEOSEC Intel" height="20"></a>

What is affected, what to do

Metrics

Response and mitigation

Prioritisation rationale

Immediate response (0-24 h)

Mitigation layers

Detection rules

Detection rules

Classification under NIS2 and CRA

Description

Affected products

Vendors and products

Affected operating systems

Weakness classes (CWE)

Public exploit references

References & sources

Changes to this CVE

Linked advisories