CVE-2021-34503 json
Microsoft Windows Media Foundation Remote Code Execution Vulnerability
published 2021-07-14 5 y ago modified 2026-08-10 2 mo ago also EUVD-2021-21157
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.3%
- EPSS 2.3% chance of exploitation in 30 days, percentile 83%
- public exploits
- 0
- none known
Summary
Microsoft Windows Media Foundation Remote Code Execution Vulnerability
Patch / fix
- Microsoft Windows 10 Version 1809 10.0.17763.2061
- Microsoft Windows 10 Version 1909 10.0.18363.1679
- Microsoft Windows Server 2019 10.0.17763.2061
- Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.2061
Exploit prediction
2.31% chance of exploitation in the next 30 days, higher than 83% 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 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 1909
- Microsoft Windows Server 2019
- Microsoft Windows Server 2019 (Server Core installation)
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2021-34503
vendor-advisory, patch
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-34503
patch, vendor-advisory
Sources
- CVE List CVE-2021-34503
- NVD CVE-2021-34503
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