CVE-2021-26431 json
Windows Recovery Environment Agent Elevation of Privilege Vulnerability
published 5y ago modified 2mo ago also EUVD-2021-13236
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
Windows Recovery Environment Agent Elevation of Privilege Vulnerability
Patch / fix
- Microsoft Windows 10 Version 2004 10.0.19041.1165
- Microsoft Windows 10 Version 20H2 10.0.19042.1165
- Microsoft Windows 10 Version 21H1 10.0.19043.1165
- Microsoft Windows Server version 2004 10.0.19041.1165
- Microsoft Windows Server version 20H2 10.0.19042.1165
Is CVE-2021-26431 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Microsoft Windows 10 Version 2004
- Microsoft Windows 10 Version 20H2
- Microsoft Windows 10 Version 21H1
- Microsoft Windows Server version 2004
- Microsoft Windows Server version 20H2
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2021-26431
vendor-advisory, patch
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-26431
patch, vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-1053/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-26431
- NVD CVE-2021-26431
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.