Vulnerability · NVD
CVE-2026-42904
CRITICAL 9.6
Heap-based buffer overflow in Windows TCP/IP allows an unauthorized attacker to elevate privileges 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:C/C:H/I:H/A:H
EPSS
0.44%
exploit very unlikely
percentile 36.2%
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 10.0.26100.32995
- Windows Server 2022 Fixed in 10.0.20348.5256
- Windows 11 26H1 · 2026-H1 Fixed in 10.0.28000.2269
- Windows 11 25H2 · 2025-H2 Fixed in 10.0.26200.8655
- Windows 11 24H2 · 2024-H2 Fixed in 10.0.26100.8655
- Windows 11 23H2 · 2023-H2 Fixed in 10.0.22631.7219
- Windows 10 22H2 · 2022-H2 Fixed in 10.0.19045.7417
- Windows 10 21H2 · 2021-H2 Fixed in 10.0.19044.7417