CVE-2026-20876 is a heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave, affecting Windows 11 versions (23H2, 24H2, 25H2) and Windows Server (2022 23H2, 2025). This vulnerability carries a CVSS score of 6.7 MEDIUM, indicating that a highly privileged local attacker can achieve high impact on confidentiality, integrity, and availability with low attack complexity. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion (12 mentions) and media coverage (2 articles), suggesting notable awareness.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 10.0.22631.6491CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* | ||
< 10.0.26100.7623CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* | ||
< 10.0.26200.7623CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:* | ||
< 10.0.25398.2092CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* | ||
< 10.0.26100.32230CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.