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Findings

CVE-2026-26173

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attac…

Published Apr 14, 2026 · updated Oct 14, 2026 · microsoft windows 10 1607

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 14, 2026 · NIST NVD

    Detected

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

  2. Oct 14, 2026 · NIST NVD

    Updated

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Affected

  • cpe microsoft/windows 10 1607version unspecified
  • cpe microsoft/windows 10 1809version unspecified
  • cpe microsoft/windows 10 21h2version unspecified
  • cpe microsoft/windows 10 22h2version unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-26173

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-26173

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-26173

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

    nvd.nist.gov

References