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CVE-2009-4635

27
FAUCET Score

CVE-2009-4635 describes a critical vulnerability in FFmpeg 0.5, where a specially crafted MOV container with malformed tags can lead to a denial of service and potentially arbitrary code execution. The vulnerability stems from inconsistent codec type handling, causing a video-structure pointer to be processed by the MP3 decoder, resulting in a stack-based buffer overflow. With a CVSS score of 9.3, this vulnerability is highly severe, allowing unauthenticated remote attackers to achieve complete compromise (confidentiality, integrity, availability) with medium attack complexity. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, suggesting it is not widely targeted.

Impacted Technologies

VendorProductVersion(s)CPE
0.5CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:0.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
8.09%
Probability of exploitation in next 30 days
EPSS Percentile
94.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0809 is in the 73rd percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

scarybeastsecurity.blogspot.com / 2009/09/patching-ffmpeg-into-shape.html
secunia.com / advisories/36805
secunia.com / advisories/38643
secunia.com / advisories/39482
roundup.ffmpeg.org / roundup/ffmpeg/issue1240
Exploit
debian.org / security/2010/dsa-2000
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
mandriva.com / security/advisories
securityfocus.com / bid/36465
ubuntu.com / usn/USN-931-1
vupen.com / english/advisories/2010/0935
vupen.com / english/advisories/2011/1241