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Fencer Vulns
high 7.8

CVE-2021-41330 json

Microsoft Windows Media Foundation Remote Code Execution Vulnerability

published 2021-10-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-28359

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

Microsoft Windows Media Foundation Remote Code Execution Vulnerability

Patch / fix

  • Microsoft Windows 10 Version 1809 10.0.17763.2237
  • Microsoft Windows Server 2019 10.0.17763.2237
  • Microsoft Windows Server 2019 (Server Core installation) 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 Server version 2004 10.0.19041.1288
  • Microsoft Windows 10 Version 20H2 10.0.19042.1288
  • Microsoft Windows Server version 20H2 10.0.19042.1288

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

2.03% chance of exploitation in the next 30 days, higher than 81% 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 Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows 10 Version 1909
  • Microsoft Windows 10 Version 21H1
  • Microsoft Windows 10 Version 2004
  • Microsoft Windows Server version 2004
  • Microsoft Windows 10 Version 20H2
  • Microsoft Windows Server version 20H2

References

Sources

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.