What’s Vulnerable › Vulnerabilities

CVE-2025-26633: Microsoft Windows Management Console (MMC) Improper Neutralization Vulnerability

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2025-03-11
• EPSS: 30.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-03-11 · updated 2026-09-24
• Weakness: CWE-707

Description

Improper neutralization in Microsoft Management Console allows an unauthorized attacker to bypass a security feature locally.

Affected products

• Microsoft Windows 10 Version 1507: before 10.0.10240.20947 — fixed in 10.0.10240.20947
• Microsoft Windows 10 1607: before 10.0.14393.7876 — fixed in 10.0.14393.7876
• Microsoft Windows 10: before 10.0.17763.7009 — fixed in 10.0.17763.7009
• Microsoft Windows 10: before 10.0.19044.5608 — fixed in 10.0.19044.5608
• Microsoft Windows 10: before 10.0.19045.5608 — fixed in 10.0.19045.5608
• Microsoft Windows 11: before 10.0.22621.5039 — fixed in 10.0.22621.5039
• Microsoft Windows 11: before 10.0.22631.5039 — fixed in 10.0.22631.5039
• Microsoft Windows 11: before 10.0.26100.3403 — fixed in 10.0.26100.3403
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: before 10.0.14393.7876 — fixed in 10.0.14393.7876
• Microsoft Windows Server 2019: before 10.0.17763.7009 — fixed in 10.0.17763.7009
• Microsoft Windows Server 2022: before 10.0.20348.3270 — fixed in 10.0.20348.3270
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1486 — fixed in 10.0.25398.1486
• Microsoft Windows Server 2025: before 10.0.26100.3403 — fixed in 10.0.26100.3403

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.20947; Microsoft Windows 10 1607 10.0.14393.7876; Microsoft Windows 10 10.0.17763.7009; Microsoft Windows 10 10.0.19044.5608; Microsoft Windows 10 10.0.19045.5608; Microsoft Windows 11 10.0.22621.5039; Microsoft Windows 11 10.0.22631.5039; Microsoft Windows 11 10.0.26100.3403; Microsoft Windows Server 2016 10.0.14393.7876; Microsoft Windows Server 2019 10.0.17763.7009; Microsoft Windows Server 2022 10.0.20348.3270; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1486. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26633
• https://www.vicarius.io/vsociety/posts/cve-2025-26633-security-feature-bypass-in-microsoft-management-console-detection-script
• https://www.vicarius.io/vsociety/posts/cve-2025-26633-security-feature-bypass-in-microsoft-management-console-mitigation-script
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-26633

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