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CVE-2026-20924 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-01-13T18:16:19.027Z and has not been modified since then. The CVE-2026-20924 vulnerability is a use-after-free issue in Windows Management Services that could allow an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. Affected products include Windows 10, Windows 11, and Windows Server versions. Organizations using affected versions should be aware of this vulnerability and take steps to mitigate it. Security teams and system administrators responsible for patching and vulnerability management are particularly relevant. This vulnerability allows an authorized attacker to elevate privileges locally, which could lead to a significant impact on the system's security. Affected organizations should prioritize patching. The CVE record indicates a use-after-free vulnerability in Windows Management Services, which could allow an authorized attacker to elevate privileges locally. The affected products include various versions of Windows 10, Windows 11, and Windows Server. To address this vulnerability, it is essential to apply patches or updates provided by Microsoft to address the vulnerability in Windows Management Services. Conducting a thorough review of system configurations and user privileges can help minimize the attack surface. Implementing additional security measures, such as monitoring and incident response planning, can help detect and respond to potential exploitation attempts.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-13
Original CVE updated
2026-07-30
Advisory published
2026-01-13
Advisory updated
2026-07-30

Who should care

Organizations using affected versions of Windows 10, Windows 11, and Windows Server should be aware of this vulnerability and take steps to mitigate it. Security teams and system administrators responsible for patching and vulnerability management are particularly relevant.

Technical summary

The CVE-2026-20924 vulnerability is a use-after-free issue in Windows Management Services that could allow an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. Affected products include Windows 10, Windows 11, and Windows Server versions.

Defensive priority

This vulnerability allows an authorized attacker to elevate privileges locally, which could lead to a significant impact on the system's security. Affected organizations should prioritize patching.

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to address the vulnerability in Windows Management Services.
  • Conduct a thorough review of system configurations and user privileges to minimize the attack surface.
  • Implement additional security measures, such as monitoring and incident response planning, to detect and respond to potential exploitation attempts.

Evidence notes

The CVE-2026-20924 record indicates a use-after-free vulnerability in Windows Management Services, which could allow an authorized attacker to elevate privileges locally. The affected products include various versions of Windows 10, Windows 11, and Windows Server.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-20924 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-20924

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-20924 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-20924

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.