CVE-2026-20838CWE-209

CVE-2026-20838

Medium · published January 13, 2026

CVSS v3.1
5.5
EPSS
1%
Percentile
50.6
In the wild
Unconfirmed
What it is

Generation of error message containing sensitive information in Windows Kernel allows an authorized attacker to disclose information locally.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00652 · 50.6th percentile
Weakness
CWE-209 · Generation of Error Message Containing Sensitive Information
Published
2026-01-13T23:16Z
Affected products (6)
ProductVersionsFixed in
microsoft/windows_11_23h2< 10.0.22631.649110.0.22631.6491
microsoft/windows_11_24h2< 10.0.26100.762310.0.26100.7623
microsoft/windows_11_25h2< 10.0.26200.762310.0.26200.7623
microsoft/windows_server_2022< 10.0.20348.464810.0.20348.4648
microsoft/windows_server_2022_23h2< 10.0.25398.209210.0.25398.2092
microsoft/windows_server_2025< 10.0.26100.3223010.0.26100.32230
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20838 · [email protected]
EPSS history
Timeline
  • 13 JAN 17:56Z
    Windows Kernel Information Disclosure Vulnerability
    cvelistv5