CriticalCVE-2022-34718

    Windows TCP/IP Remote Code Execution Vulnerability (CVE-2022-34718)

    Published Sources: SingCERT, CVE.org

    What is affected, what to do

    Windows TCP/IP Remote Code Execution Vulnerability

    The vulnerability is being actively exploited; treat it as a priority. Update Microsoft Windows 10 Version 1809 to version 10.0.17763.3406, Microsoft Windows Server 2019 to version 10.0.17763.3406, Microsoft Windows Server 2019 (Server Core installation) to version 10.0.17763.3406.

    Affected
    • Microsoft Windows 10 Version 1809 lt 10.0.17763.0..10.0.17763.3406
    • Microsoft Windows Server 2019 lt 10.0.17763.0..10.0.17763.3406
    • Microsoft Windows Server 2019 (Server Core installation) lt 10.0.17763.0..10.0.17763.3406
    • Microsoft Windows 10 Version 21H1 lt 10.0.0..10.0.19043.2006
    • Microsoft Windows Server 2022 lt 10.0.20348.0..10.0.20348.1006
    • Microsoft Windows 10 Version 20H2 lt 10.0.0..10.0.19042.2006
    • Microsoft Windows 11 version 21H2 lt 10.0.0..10.0.22000.978
    • Microsoft Windows 10 Version 21H2 lt 10.0.19043.0..10.0.19044.2006
    • Microsoft Windows 10 Version 1507 lt 10.0.10240.0..10.0.10240.19444
    • Microsoft Windows 10 Version 1607 lt 10.0.14393.0..10.0.14393.5356
    • Microsoft Windows Server 2016 lt 10.0.14393.0..10.0.14393.5356
    • Microsoft Windows Server 2016 (Server Core installation) lt 10.0.14393.0..10.0.14393.5356
    • Microsoft Windows 7 lt 6.1.0..6.1.7601.26115
    • Microsoft Windows 7 Service Pack 1 lt 6.1.0..6.1.7601.26115
    • Microsoft Windows 8.1 lt 6.3.0..6.3.9600.20571
    • Microsoft Windows Server 2008 Service Pack 2 lt 6.0.6003.0..6.0.6003.21666
    • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) lt 6.0.6003.0..6.0.6003.21666
    • Microsoft Windows Server 2008 R2 Service Pack 1 lt 6.1.7601.0..6.1.7601.26115
    • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) lt 6.1.7601.0..6.1.7601.26115
    • Microsoft Windows Server 2012 lt 6.2.9200.0..6.2.9200.23865
    • Microsoft Windows Server 2012 (Server Core installation) lt 6.2.9200.0..6.2.9200.23865
    • Microsoft Windows Server 2012 R2 lt 6.3.9600.0..6.3.9600.20571
    • Microsoft Windows Server 2012 R2 (Server Core installation) lt 6.3.9600.0..6.3.9600.20571
    Fixed in
    • Microsoft Windows 10 Version 1809 10.0.17763.3406
    • Microsoft Windows Server 2019 10.0.17763.3406
    • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.3406
    • Microsoft Windows 10 Version 21H1 10.0.19043.2006
    • Microsoft Windows Server 2022 10.0.20348.1006
    • Microsoft Windows 10 Version 20H2 10.0.19042.2006
    • Microsoft Windows 11 version 21H2 10.0.22000.978
    • Microsoft Windows 10 Version 21H2 10.0.19044.2006
    • Microsoft Windows 10 Version 1507 10.0.10240.19444
    • Microsoft Windows 10 Version 1607 10.0.14393.5356
    • Microsoft Windows Server 2016 10.0.14393.5356
    • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.5356
    • Microsoft Windows 7 6.1.7601.26115
    • Microsoft Windows 7 Service Pack 1 6.1.7601.26115
    • Microsoft Windows 8.1 6.3.9600.20571
    • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21666
    • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.21666
    • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.26115
    • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.26115
    • Microsoft Windows Server 2012 6.2.9200.23865
    • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.23865
    • Microsoft Windows Server 2012 R2 6.3.9600.20571
    • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.20571

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    9.8

    Priority

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

    Source: Vendor (CNA), CVSS v3

    9.8

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: SingCERT, CVE.org

    54.7 %

    EPSS score

    High — model estimates ≥ 50% chance of real-world exploitation within 30 days.

    Source: FIRST EPSS, percentile 99.01

    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
    128.83 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: ANSSI / CERT-FR, CSA/SingCERT 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
    9.8 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
    9.8
    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
    54.7 %
    High — model estimates ≥ 50% chance of real-world exploitation within 30 days.
    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
    99.01
    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
    —
    Published

    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

    Windows TCP/IP Remote Code Execution Vulnerability

    Source: CSA/SingCERT, NVD (NIST), cvelistv5

    Affected products

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

    Affected products
    Affected versionsFixed in
    MicrosoftWindows 10 Version 1507
    • 10.0.10240.0 – < 10.0.10240.19444
    • 10.0.10240.19444
    MicrosoftWindows 10 Version 1607
    • 10.0.14393.0 – < 10.0.14393.5356
    • 10.0.14393.5356
    MicrosoftWindows 10 Version 1809
    • 10.0.17763.0 – < 10.0.17763.3406
    • 10.0.17763.3406
    MicrosoftWindows 10 Version 20H2
    • 10.0.0 – < 10.0.19042.2006
    • 10.0.19042.2006
    MicrosoftWindows 10 Version 21H1
    • 10.0.0 – < 10.0.19043.2006
    • 10.0.19043.2006
    MicrosoftWindows 10 Version 21H2
    • 10.0.19043.0 – < 10.0.19044.2006
    • 10.0.19044.2006
    MicrosoftWindows 11 version 21H2
    • 10.0.0 – < 10.0.22000.978
    • 10.0.22000.978
    MicrosoftWindows 7
    • 6.1.0 – < 6.1.7601.26115
    • 6.1.7601.26115
    MicrosoftWindows 7 Service Pack 1
    • 6.1.0 – < 6.1.7601.26115
    • 6.1.7601.26115
    MicrosoftWindows 8.1
    • 6.3.0 – < 6.3.9600.20571
    • 6.3.9600.20571
    MicrosoftWindows Server 2008 R2 Service Pack 1
    • 6.1.7601.0 – < 6.1.7601.26115
    • 6.1.7601.26115
    MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)
    • 6.1.7601.0 – < 6.1.7601.26115
    • 6.1.7601.26115
    MicrosoftWindows Server 2008 Service Pack 2
    • 6.0.6003.0 – < 6.0.6003.21666
    • 6.0.6003.21666
    MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)
    • 6.0.6003.0 – < 6.0.6003.21666
    • 6.0.6003.21666
    MicrosoftWindows Server 2012
    • 6.2.9200.0 – < 6.2.9200.23865
    • 6.2.9200.23865
    MicrosoftWindows Server 2012 (Server Core installation)
    • 6.2.9200.0 – < 6.2.9200.23865
    • 6.2.9200.23865
    MicrosoftWindows Server 2012 R2
    • 6.3.9600.0 – < 6.3.9600.20571
    • 6.3.9600.20571
    MicrosoftWindows Server 2012 R2 (Server Core installation)
    • 6.3.9600.0 – < 6.3.9600.20571
    • 6.3.9600.20571
    MicrosoftWindows Server 2016
    • 10.0.14393.0 – < 10.0.14393.5356
    • 10.0.14393.5356
    MicrosoftWindows Server 2016 (Server Core installation)
    • 10.0.14393.0 – < 10.0.14393.5356
    • 10.0.14393.5356
    MicrosoftWindows Server 2019
    • 10.0.17763.0 – < 10.0.17763.3406
    • 10.0.17763.3406
    MicrosoftWindows Server 2019 (Server Core installation)
    • 10.0.17763.0 – < 10.0.17763.3406
    • 10.0.17763.3406
    MicrosoftWindows Server 2022
    • 10.0.20348.0 – < 10.0.20348.1006
    • 10.0.20348.1006

    Vendors and products

    Affected operating systems

    Affected operating systems
    Windowsmicrosoftwindows_101607
    Windowsmicrosoftwindows_101809
    Windowsmicrosoftwindows_1020h2
    Windowsmicrosoftwindows_1021h1
    Windowsmicrosoftwindows_1021h2
    Windowsmicrosoftwindows_10—
    Windowsmicrosoftwindows_11—
    Windowsmicrosoftwindows_7—
    Windowsmicrosoftwindows_8.1—
    Windowsmicrosoftwindows_rt_8.1—
    Windowsmicrosoftwindows_server_2008r2
    Windowsmicrosoftwindows_server_2008—
    Windowsmicrosoftwindows_server_2012r2
    Windowsmicrosoftwindows_server_2012—
    Windowsmicrosoftwindows_server_2016—
    Windowsmicrosoftwindows_server_2019—
    Windowsmicrosoftwindows_server_2022—

    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
    CSA/SingCERTSeptember 2022 Monthly Patch (opens in a new tab)CSA/SingCERTactively exploited
    ANSSI / CERT-FRLicence Ouverte 2.0, as of CERTFR-2022-ALE-007 – Multiples vulnérabilités dans Microsoft Windows (clôturée 2023-03-14) (opens in a new tab)cert.cyber.gouv.fractively exploited

    References & sources

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    <a href="https://intel.neosec.eu/en/cve/CVE-2022-34718"><img src="https://intel.neosec.eu/badge/cve/CVE-2022-34718.svg?lang=en" alt="CVE-2022-34718 – NEOSEC Intel" height="20"></a>