What is CVE-2021-32273?

CVE-2021-32273 is a high-severity vulnerability in Faad2 Project, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-09-20.

How severe is CVE-2021-32273?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2021-32273 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Faad2 Project

CVE-2021-32273

An issue was discovered in faad2 through 2.10.0. A stack-buffer-overflow exists in the function ftypin located in mp4read.c. It allows an attacker to cause Code Execution.

Vulnerability class: Buffer Overflow

Published 2021-09-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (66.9th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Faad2 Project
Debian Linux — versions 10.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

seviezhou/Kraken

References

github.com/knik0/faad2/issues/56 (Exploit, Third Party Advisory, Issue Tracking)
www.debian.org/security/2022/dsa-5109 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2021-32273?: CVE-2021-32273 is a high-severity vulnerability in Faad2 Project, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-09-20.
How severe is CVE-2021-32273?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-32273 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.