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CVE-2026-69451 Microsoft CVE debrief

CVE-2026-69451 is a high-severity vulnerability in Windows Management Instrumentation that allows an authorized attacker to elevate privileges over a network. The CVE record was published on 2026-09-08T18:19:09.640Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability is a use-after-free issue that affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. Defenders responsible for securing Windows systems, especially those exposed to the internet or untrusted networks, should prioritize patching vulnerable systems. The vulnerability allows for elevation of privileges by an authorized attacker over a network,

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-25
Advisory published
2026-09-08
Advisory updated
2026-09-25

Who should care

Defenders responsible for securing Windows systems, especially those exposed to the internet or untrusted networks, should prioritize patching vulnerable systems.

Why it matters

CVE-2026-69451 is a high-severity vulnerability in Windows Management Instrumentation that allows an authorized attacker to elevate privileges over a network. Defenders should prioritize patching vulnerable systems, especially those exposed to the internet or untrusted networks.

  • Elevation of privileges by an authorized attacker over a network.
  • Potential for lateral movement within a compromised network.
  • Need for patching vulnerable systems to prevent exploitation.

Technical summary

The vulnerability is a use-after-free issue in Windows Management Instrumentation that allows an authorized attacker to elevate privileges over a network. The issue affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server.

Defensive priority

Defenders should prioritize patching vulnerable systems, especially those exposed to the internet or untrusted networks.

Recommended defensive actions

  • Patch vulnerable systems, especially those exposed to the internet or untrusted networks.
  • Verify that Windows Management Instrumentation is properly configured and secured.
  • Monitor for suspicious activity related to Windows Management Instrumentation.

Evidence notes

The vulnerability is described as a use-after-free issue in Windows Management Instrumentation. Microsoft has provided a patch for the vulnerability. The issue affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. There is no evidence of exploitation in the wild, but defenders should verify that Windows Management Instrumentation is properly configured and secured. The CVE record was published on 2026-09-08T18:19:09.640Z and has not been modified

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69451 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69451

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

  • CVE-2026-69451 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69451

    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.