Vulnerability · NVD
CVE-2026-54999
HIGH 8.8
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an unauthorized attacker to execute code over an adjacent network.
Attack vector : Adjacent network
No privileges required
No user interaction
Show raw CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
0.29%
exploit very unlikely
percentile 21.4%
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
- Windows Server 2025 Fixed in 10.0.26100.33158
- Windows Server 2022 Fixed in 10.0.20348.5386
- Windows Server 2019 Fixed in 10.0.17763.9020
- Windows Server 2016 Fixed in 10.0.14393.9339
- Windows 11 26H1 · 2026-H1 Fixed in 10.0.28000.2525
- Windows 11 25H2 · 2025-H2 Fixed in 10.0.26200.8875
- Windows 11 24H2 · 2024-H2 Fixed in 10.0.26100.8875
- Windows 10 22H2 · 2022-H2 Fixed in 10.0.19045.7548
- Windows 10 21H2 · 2021-H2 Fixed in 10.0.19044.7548
- Windows 10 1809 · 2018-09 Fixed in 10.0.17763.9020
- Windows 10 1607 · 2016-07 Fixed in 10.0.14393.9339