CVE-2026-20876

  1. Yack CVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-20876

6.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

H

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

References
Link Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20876 Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
History

15 Jan 2026, 21:28

Type Values Removed Values Added
First Time Microsoft windows 11 23h2
Microsoft windows Server 2022 23h2
Microsoft windows 11 24h2
Microsoft windows 11 25h2
Microsoft
Microsoft windows Server 2025
References () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20876 - () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20876 - Vendor Advisory
CPE cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*

13 Jan 2026, 18:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-13 18:16

Updated : 2026-01-15 21:28

NVD link : CVE-2026-20876

Mitre link : CVE-2026-20876

CVE.ORG link : CVE-2026-20876

JSON object : View

Products Affected

microsoft

CWE
CWE-122

Heap-based Buffer Overflow