What’s Vulnerable › Vulnerabilities

CVE-2021-30123

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-07 · updated 2026-06-17
• Weakness: CWE-120

Description

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

Affected products

• FFmpeg: 4.4

References

• http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=d6f293353c94c7ce200f6e0975ae3de49787f91f
• https://security.gentoo.org/glsa/202105-24
• https://trac.ffmpeg.org/ticket/8845
• https://trac.ffmpeg.org/ticket/8863
• http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=d6f293353c94c7ce200f6e0975ae3de49787f91f
• https://security.gentoo.org/glsa/202105-24
• https://trac.ffmpeg.org/ticket/8845
• https://trac.ffmpeg.org/ticket/8863

Get alerted when CVE-2021-30123 or the next vulnerability affects your stack