CVE-2021-30123

HIGH 8.8CVE-2021-30123 · Published 07/04/2021 · updated 17/06/2026

In short

CVE-2021-30123 is a HIGH (CVSS 8.8) vulnerability affecting ffmpeg (ffmpeg).
Chance of exploitation in the next 30 days (EPSS): 3.4%, higher than 88.9% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
ffmpeg ffmpeg	`= 4.4`	No fix yet

FFmpeg <=4.3 contains a buffer overflow vulnerability in libavcodec through a crafted file that may lead to remote code execution.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

= 4.4

No fix yet

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