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CVE-2026-61927 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-11T17:03:55.714Z and has not been modified since then. The Windows Bind Filter Driver Elevation of Privilege Vulnerability (CVE-2026-61927) is a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. This vulnerability affects Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2025, and Windows Server 2025 (Server Core installation). Defenders should verify exposure, apply patches, and monitor systems to prevent potential attacks. The CVE Program and NIST NVD provide official details on this CVE. A

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-10-08
Advisory published
2026-08-11
Advisory updated
2026-10-08

Who should care

Defenders responsible for Windows 11 and Windows Server systems should assess exposure and apply patches to prevent potential privilege elevation attempts.

Why it matters

CVE-2026-61927 is a high-severity elevation of privilege vulnerability in Windows Bind Filter Driver. Defenders should verify exposure, apply patches, and monitor systems to prevent potential attacks.

  • Verify exposure of affected Windows systems
  • Apply patches to prevent privilege elevation
  • Monitor systems for potential privilege elevation attempts
  • Assess and update inventory of affected systems

Technical summary

The Windows Bind Filter Driver Elevation of Privilege Vulnerability (CVE-2026-61927) is a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. The vulnerability affects Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2025, and Windows Server 2025 (Server Core installation).

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2025, and Windows Server 2025 (Server Core installation) systems.

Recommended defensive actions

  • Verify exposure of Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2025, and Windows Server 2025 (Server Core installation) systems
  • Apply patches provided by Microsoft for the affected systems
  • Monitor systems for potential privilege elevation attempts

Evidence notes

The CVE record and source item provide details on the vulnerability in Windows Bind Filter Driver, which allows an authorized attacker to elevate privileges locally. However, specific details on exploitation and impact are limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-61927 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-61927

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

  • CVE-2026-61927 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-61927

    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.