CVE-2026-20876CWE-122

CVE-2026-20876

Medium · published January 13, 2026

CVSS v3.1
6.7
EPSS
1%
Percentile
42.5
In the wild
Unconfirmed
What it is

Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
6.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00508 · 42.5th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-01-13T23:16Z
Affected products (5)
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_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-2026-20876 · [email protected]
EPSS history
Timeline
  • 13 JAN 17:56Z
    Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability
    cvelistv5