SonicWall SMA1000 Missing Authorization Vulnerability (CVE-2025-40602)
Published In CISA KEV since Sources: pwn.watch, CVE.org
What is affected, what to do
A local privilege escalation vulnerability due to insufficient authorization in the SonicWall SMA1000 appliance management console (AMC).
The vulnerability is being actively exploited; treat it as a priority. Update sma8200v to version 12.4.3-03245. Immediate actions, mitigation and detection rules are in the runbook below.
- Affected
- SonicWall SMA1000
eq 12.4.3-03093 (platform-hotfix) and earlier versions..12.4.3-03093 (platform-hotfix) and earlier versions - SonicWall SMA1000
eq 12.5.0-02002 (platform-hotfix) and earlier versions..12.5.0-02002 (platform-hotfix) and earlier versions
- SonicWall SMA1000
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
6.6
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
6.6
CVSS v3
Severity Medium on the scale from 0 to 10.
Source: pwn.watch, CVE.org
2.8 %
EPSS score
Moderate — model estimates 1-10% exploitation likelihood.
Source: FIRST EPSS, percentile 86.2
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- 205.26 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) 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- 6.6 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- 6.6
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- 2.8 %
- 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- 86.2
- 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
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 glossaryCWE
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-862, CWE-250
Response and mitigation
Why act now?
Prioritisation rationale
On its own, this bug requires high privileges on the AMC and carries higher attack complexity. It sits on KEV because it has been chained with a pre-auth SMA1000 flaw, together giving unauthenticated root-level takeover of the appliance. These attacks target perimeter remote-access gateways, which concentrate AD integration, user sessions and credentials and offer a direct path into the internal network. CISA does not flag ransomware use, and the modelled exploitation likelihood is elevated rather than extreme. For organisations with an internet-exposed SMA1000, treat patching plus a compromise assessment as urgent within 24-72 hours. Where the AMC is already confined to an admin network and CVE-2025-23006 is long patched, scheduling the fix in the next emergency maintenance window is acceptable.
Runbook step 1
Immediate response (0-24 h)
- Apply the platform hotfix: Upgrade every SMA1000 appliance (including SMA 6200, 6210, 7200 and virtual instances) to 12.4.3-03245 (12.4.x branch) or 12.5.0-02283 (12.5.x branch) or later. Affected builds are 12.4.3-03093 and earlier, and 12.5.0-02002 and earlier. Prioritise appliances whose AMC or Workplace portal is internet-facing. Check the vendor advisory for the exact hotfix package and the upgrade order in clustered or CMC-managed deployments.
- Restrict AMC exposure now: The Appliance Management Console (AMC) and the Central Management Console (CMC) must only be reachable from a dedicated admin network or a jump-host allowlist. Block the management port (HTTPS 8443 by default; verify against your own config) from every other source on the upstream firewall.
- Check for compromise before patching: Vendor and research reporting describes this flaw being chained with the pre-auth deserialisation bug CVE-2025-23006 to gain unauthenticated root access. Unless CVE-2025-23006 has demonstrably been patched for some time, treat the appliance as potentially compromised. Export configuration and logs for evidence preservation before rebooting or patching.
- Rotate secrets: Rotate all local AMC admin accounts, LDAP/AD bind accounts, RADIUS shared secrets, SAML signing keys and any certificates stored on the appliance. Terminate active VPN and portal sessions.
- Reconcile accounts and config: Compare the AMC administrator list against your documented baseline. Remove unknown accounts, new access policies, altered auth servers or added resource definitions immediately, and escalate as an incident (assess NIS2 reporting obligations).
Runbook step 2
Mitigation layers
- Network segmentation: Separate the management interface from the user/internet interface, physically or by VLAN. Allow AMC access only via a PAW or bastion host with MFA. Apply an egress allowlist so the appliance can only reach required destinations (AD, RADIUS, NTP, DNS, SonicWall update servers). Drop and log everything else.
- IPS/WAF: Enable or update SonicWall SMA1000 exploit signatures (including CVE-2025-23006) on the upstream NGFW. Drop internet requests to AMC paths outright rather than merely inspecting them.
- IAM/least privilege: Reduce the number of AMC admins to the minimum, use delegated roles instead of full admin, and enforce MFA on all administrative logins. Eliminate shared admin accounts.
- Configuration hardening: Disable unused services (SSH access, unused management interfaces, legacy protocols). Enable remote syslog to the SIEM so logs do not live solely on the appliance.
- Fallback: If the hotfix cannot be deployed promptly, evaluate taking the appliance offline or failing over to a patched or alternative remote-access solution. Simply accepting the risk is not defensible for an exposed AMC.
Runbook step 3
Detection rules
- AMC logins (appliance syslog in SIEM): Successful admin logins from source IPs outside the admin network, logins outside maintenance windows, and newly created admin accounts. SPL shape:
index=sma sourcetype=sonicwall:sma "AMC" (login OR "administrator added") NOT src_ip IN (<admin_subnet>) - Network telemetry (Zeek/Suricata/NGFW): Connections to the AMC port from non-approved networks, plus outbound connections from the appliance to unknown destinations (especially HTTP(S) to VPS providers, unusual ports, reverse shells). Zeek shape:
conn.log id.orig_h == <sma_ip> AND id.resp_h NOT IN <egress_allowlist> - Configuration changes: Audit events for modified authentication servers, new access policies, certificate imports or firmware/hotfix operations outside approved changes. Correlate with change-management tickets.
- Lateral follow-on activity: The SMA's LDAP bind or service account authenticating to systems other than the expected domain controllers. Look at Windows Event ID 4624/4625 (logon type 3) and 4768/4769 for that account from unusual hosts. KQL shape:
SecurityEvent | where TargetUserName == "<sma_bind_account>" and Computer !in (<dc_list>) - Integrity verification: After patching, ask vendor support for an integrity check or log review for indicators of CVE-2025-23006/CVE-2025-40602 exploitation. If persistence is suspected, rebuild the appliance rather than just patching it.
- AMC logins (appliance syslog in SIEM): Successful admin logins from source IPs outside the admin network, logins outside maintenance windows, and newly created admin accounts. SPL shape:
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
A local privilege escalation vulnerability due to insufficient authorization in the SonicWall SMA1000 appliance management console (AMC).
Source: pwn.watch, NVD (NIST), cvelistv5, CISA KEV Catalog, CVE.org (MITRE)
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| SonicWall | SMA1000 |
|
|
| sonicwall | sma8200v |
|
|
Vendors and products
Affected operating systems
| Other | sonicwall | sma6200_firmware | — |
| Other | sonicwall | sma6210_firmware | — |
| Other | sonicwall | sma7200_firmware | — |
| Other | sonicwall | sma7210_firmware | — |
Weakness classes (CWE)
CWE-862Missing Authorization
Class
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Entry at MITRE CWE-862CWE-250Execution with Unnecessary Privileges
Base
The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.
Entry at MITRE CWE-250
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.
| CISA KEV Catalog | CISA Known Exploited Vulnerability (opens in a new tab)cisa.gov | actively exploited |
References & sources
- psirt.global.sonicwall.comSonicWall advisory: SonicWall SMA1000 applianceVendor advisory, Vendor advisory, pwn-watch
- cisa.govknown-exploited-vulnerabilities-catalog?field_cve=CVE-2025-40602government-resource, US government resource
- pwn.watchpwn.watch: SonicWall SMA1000 appliance: SMA1000 Missing Authorization Vulnerabilitypwn-watch
- NVD (NIST)NVD: CVE-2025-40602pwn-watch
- cisa.govCISA Known Exploited Vulnerabilities Catalogpwn-watch
Embed badge
Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.
<a href="https://intel.neosec.eu/en/cve/CVE-2025-40602"><img src="https://intel.neosec.eu/badge/cve/CVE-2025-40602.svg?lang=en" alt="CVE-2025-40602 – NEOSEC Intel" height="20"></a>