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PatchSiren cyber security CVE debrief

CVE-2026-77500 Microsoft CVE debrief

CVE-2026-77500 is a high-severity vulnerability in the Windows Device Association Service that allows an authorized attacker to elevate privileges locally. The CVE record was published on 2026-09-08T18:20:36.797Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability requires immediate attention from defenders responsible for Windows systems, especially those with high-risk exposure. The vulnerability is caused by a release of invalid pointer or reference in the Windows Device Association Service. Local privilege escalation can lead to significant impact if exploited. Defenders should prioritize patching this vulnerability, especially for high

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-16
Advisory published
2026-09-08
Advisory updated
2026-09-16

Who should care

Defenders responsible for Windows systems, especially those with high-risk exposure, should assess and prioritize patching for CVE-2026-77500.

Why it matters

CVE-2026-77500 is a high-severity vulnerability that requires immediate attention from defenders responsible for Windows systems.

  • Local privilege escalation can lead to significant impact if exploited
  • Patching is required to prevent exploitation
  • Inventory and verification of exposure are necessary

Technical summary

The Windows Device Association Service vulnerability allows an authorized attacker to elevate privileges locally due to a release of invalid pointer or reference. This vulnerability is a high-severity issue that requires immediate attention from defenders responsible for Windows systems. The vulnerability can lead to significant impact if exploited, including local privilege escalation. Defenders should prioritize patching this vulnerability, especially for systems with high-risk exposure. Microsoft has provided a patch for this vulnerability, and defenders should

Defensive priority

Defenders should prioritize patching this vulnerability, especially for systems with high-risk exposure. Local privilege escalation can lead to significant impact if exploited.

Recommended defensive actions

  • Apply patches from Microsoft for CVE-2026-77500
  • Inventory Windows systems for exposure
  • Verify local privilege escalation controls

Evidence notes

The vulnerability is described as a release of invalid pointer or reference in Windows Device Association Service. Microsoft has provided a patch for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-77500 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-77500

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

  • CVE-2026-77500 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-77500

    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.