CVE-2021-43239 is an Elevation of Privilege vulnerability affecting the Windows Recovery Environment Agent across various Windows 10, 11, and Server versions. With a CVSS score of 7.8 (High), it allows a local attacker with low privileges to achieve full confidentiality, integrity, and availability impact without user interaction. While no public exploit code or active exploitation is reported, its presence on Microsoft's December 2021 Patch Tuesday highlights its significance. Community discussion and media coverage are minimal, suggesting limited public awareness despite its high severity.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
20h2CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:arm64:* | ||
20h2CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x64:* | ||
20h2CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x86:* | ||
21h1CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:arm64:* | ||
21h1CPE matchmatch criteria | cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x64:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.