CVE-2021-34439 json
Microsoft Windows Media Foundation Remote Code Execution Vulnerability
published 2021-07-16 5 y ago modified 2026-08-10 2 mo ago also EUVD-2021-21094
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.7%
- EPSS 2.7% chance of exploitation in 30 days, percentile 85%
- public exploits
- 0
- none known
Summary
Microsoft Windows Media Foundation Remote Code Execution Vulnerability
Patch / fix
- Microsoft Windows 10 Version 1507 10.0.10240.19003
- Microsoft Windows 10 Version 1607 10.0.14393.4530
- Microsoft Windows Server 2016 10.0.14393.4530
- Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.4530
Exploit prediction
2.67% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- Microsoft Windows 10 Version 1507
- Microsoft Windows 10 Version 1607
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core installation)
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2021-34439
vendor-advisory, patch
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-34439
patch, vendor-advisory
Sources
- CVE List CVE-2021-34439
- NVD CVE-2021-34439
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