CVE-2026-27921
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
Published Apr 14, 2026 · updated Oct 14, 2026 · microsoft windows 10 1607
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
Timeline
Detection, updates, and resolution for this record.
Apr 14, 2026 · NIST NVD
Detected
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
Oct 14, 2026 · NIST NVD
Updated
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP 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.orgCVE-2026-27921
Official CVE identifier
cve.org - FIRST EPSSCVE-2026-27921
30-day exploitation probability 0.2%
first.org - NIST NVDCVE-2026-27921
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
nvd.nist.gov