CVE-2021-41342 json
Windows MSHTML Platform Remote Code Execution Vulnerability
published 2021-10-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-28371
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
Windows MSHTML Platform Remote Code Execution Vulnerability
Patch / fix
- Microsoft Windows Server 2022 10.0.20348.288
- Microsoft Windows 11 version 21H2 10.0.22000.258
- Microsoft Windows 10 Version 1809 10.0.17763.2237
- Microsoft Windows Server 2019 10.0.17763.2237
- Microsoft Windows 10 Version 1909 10.0.18363.1854
- Microsoft Windows 10 Version 21H1 10.0.19043.1288
- Microsoft Windows 10 Version 2004 10.0.19041.1288
- Microsoft Windows 10 Version 20H2 10.0.19042.1288
- Microsoft Windows 10 Version 1507 10.0.10240.19086
- Microsoft Windows 10 Version 1607 10.0.14393.4704
- Microsoft Windows Server 2016 10.0.14393.4704
- Microsoft Windows 7 1.001, 6.1.7601.25740
- Microsoft Windows 7 Service Pack 1 1.001, 6.1.7601.25740
- Microsoft Windows 8.1 1.001, 6.3.9600.20144
- Microsoft Windows Server 2008 Service Pack 2 1.001, 6.0.6003.21251
- Microsoft Windows Server 2008 Service Pack 2 1.001, 6.0.6003.21251
- Microsoft Windows Server 2008 R2 Service Pack 1 1.001, 6.1.7601.25740
- Microsoft Windows Server 2012 1.001, 6.2.9200.23490
- Microsoft Windows Server 2012 R2 1.001, 6.3.9600.20144
Exploit prediction
1.63% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C |
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Microsoft Windows Server 2022
- Microsoft Windows 11 version 21H2
- Microsoft Windows 10 Version 1809
- Microsoft Windows Server 2019
- Microsoft Windows 10 Version 1909
- Microsoft Windows 10 Version 21H1
- Microsoft Windows 10 Version 2004
- Microsoft Windows 10 Version 20H2
- Microsoft Windows 10 Version 1507
- Microsoft Windows 10 Version 1607
- Microsoft Windows Server 2016
- Microsoft Windows 7
- Microsoft Windows 7 Service Pack 1
- Microsoft Windows 8.1
- Microsoft Windows Server 2008 Service Pack 2
- Microsoft Windows Server 2008 Service Pack 2
- Microsoft Windows Server 2008 R2 Service Pack 1
- Microsoft Windows Server 2012
- Microsoft Windows Server 2012 R2
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-41342
patch, vendor-advisory
Sources
- CVE List CVE-2021-41342
- NVD CVE-2021-41342
Fencer Vulns 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.