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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-21231

CVE-2026-21231: 1 tracked advisory record across MS Server. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

MS Server

1 advisory
  • Advisory severityHigh7.8

    High [CVE-2026-21231] Windows Kernel Elevation of Privilege Vulnerability

    CVE-2026-21231Source published Source updated

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges locally. Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 8 more. Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).

    Affected products in this advisory
    • Windows Server 2012 (Server Core installation)
    • Windows Server 2012 R2 (Server Core installation)
    • Windows Server 2016 (Server Core installation)
    • Windows Server 2019 (Server Core installation)

    2 more entries in the full advisory.

    Source-reported affected versions
    • Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.8868
    • Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.8389
    • Windows 10 Version 21H2 10.0.19044.0 before 10.0.19044.6937
    • Windows 10 Version 22H2 10.0.19045.0 before 10.0.19045.6937

    8 more entries in the full advisory.

    Source-reported fixed versions
    • 10.0.14393.8868
    • 10.0.17763.8389
    • 10.0.19044.6937
    • 10.0.19045.6937

    8 more entries in the full advisory.

    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

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