Vulnerability · NVD
CVE-2026-40397
HIGH 7.8
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Attack vector : Local
No user interaction
Show raw CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
0.27%
exploit very unlikely
percentile 19.5%
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 10.0.26100.32860
- Windows Server 2022 (Server Core installation) Fixed in 10.0.20348.5139
- Windows Server 2022 Fixed in 10.0.25398.2330
- Windows Server 2019 Fixed in 10.0.17763.8755
- Windows Server 2016 Fixed in 10.0.14393.9140
- Windows 11 26H1 · 2026-H1 Fixed in 10.0.28000.2113
- Windows 11 25H2 · 2025-H2 Fixed in 10.0.26200.8457
- Windows 11 24H2 · 2024-H2 Fixed in 10.0.26100.8457
- 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 10.0.19044.7291
- Windows 10 1809 · 2018-09 Fixed in 10.0.17763.8755
- Windows 10 1607 · 2016-07 Fixed in 10.0.14393.9140