CVE-2021-32273

An issue was discovered in faad2 through 2.10.0. A stack-buffer-overflow exists in the function...

7.8 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.15%Up 0.4 points since Sep 21, 2021

What each source reports

NVD Score used 7.8

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.

Record: CVE-2021-32273
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

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.

Record: CVE-2021-32273
Updated: 2026-11-02

EUVDEUVD-2021-19128 No score

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.

Record: EUVD-2021-19128
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pgjp-28w5-m45g 7.8

An issue was discovered in faad2 through 2.10.0. A stack-buffer-overflow exists in the function...

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.

Record: GHSA-pgjp-28w5-m45g
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSVALPINE-CVE-2021-32273 7.8

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.

Record: ALPINE-CVE-2021-32273
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSV 7.8

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.

Record: CVE-2021-32273
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2021-32273 7.8

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.

Record: DEBIAN-CVE-2021-32273
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-32273 7.8

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.

Record: UBUNTU-CVE-2021-32273
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUSN-6313-1 No score

faad2 vulnerabilities

It was discovered that FAAD2 incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to execute arbitrary code. (CVE-2021-32272, CVE-2021-32273, CVE-2021-32274, CVE-2021-32277, CVE-2021-32278, CVE-2023-38857, CVE-2023-38858)

Record: USN-6313-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`faad2` Alpine:v3.16	before 2.10.1-r0	2.10.1-r0
`faad2` Alpine:v3.17	before 2.10.1-r0	2.10.1-r0
`faad2` Alpine:v3.18	before 2.10.1-r0	2.10.1-r0
`faad2` Alpine:v3.19	before 2.10.1-r0	2.10.1-r0
`faad2` Alpine:v3.20	before 2.10.1-r0	2.10.1-r0
`faad2` Alpine:v3.21	before 2.10.1-r0	2.10.1-r0
`faad2` Alpine:v3.22	before 2.10.1-r0	2.10.1-r0
`faad2` Alpine:v3.23	before 2.10.1-r0	2.10.1-r0
`faad2` Alpine:v3.24	before 2.10.1-r0	2.10.1-r0
`faad2` Debian:12	before 2.10.0-1	2.10.0-1

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Affected packages
Package	Affected	Fixed
`faad2` Debian:13	before 2.10.0-1	2.10.0-1
`faad2` Debian:14	before 2.10.0-1	2.10.0-1
`faad2` Debian:10 From an advisory covering 10 CVEs	before 2.10.0-1~deb10u1, plus listed versions 2.8.8-32.8.8-3+deb10u12.8.8-3.12.8.8-3.22.9.0-12.9.1-12.9.2-1	2.10.0-1~deb10u1
`faad2` Ubuntu:Pro:14.04:LTS	before 2.7-8+deb8u3ubuntu0.1~esm1, plus listed versions 2.7-82.7-8+deb7u1build0.14.04.12.7-8+deb8u3build0.14.04.1~esm1	2.7-8+deb8u3ubuntu0.1~esm1
`faad2` Ubuntu:Pro:16.04:LTS	before 2.8.0~cvs20150510-1ubuntu0.1+esm1, plus listed versions 2.8.0~cvs20150510-12.8.0~cvs20150510-1ubuntu0.1	2.8.0~cvs20150510-1ubuntu0.1+esm1
`faad2` Ubuntu:Pro:18.04:LTS	before 2.8.8-1ubuntu0.1~esm1, plus listed versions 2.8.1-22.8.5-12.8.6-12.8.8-1	2.8.8-1ubuntu0.1~esm1
`faad2` Ubuntu:20.04:LTS	before 2.9.1-1ubuntu0.1, plus listed versions 2.8.8-3.22.9.0-12.9.1-1	2.9.1-1ubuntu0.1
`welle.io` Ubuntu:20.04:LTS	All versions, plus listed versions 2.0~beta2-22.0-22.1-12.1-22.1-2build1	None known
`welle.io` Ubuntu:22.04:LTS	All versions, plus listed versions 2.2-12.2-1build1	None known
`welle.io` Ubuntu:24.04:LTS	All versions, plus listed versions 2.4+ds-22.4+ds-2build12.4+ds-2build32.4+ds-2build42.4+ds-2build5	None known
`welle.io` Ubuntu:25.10	All versions, plus listed versions 2.4+ds-4	None known
`welle.io` Ubuntu:26.10	All versions, plus listed versions 2.7+ds-12.7+ds-2	None known
`welle.io` Ubuntu:26.04:LTS	All versions, plus listed versions 2.4+ds-42.4+ds-4.12.7+ds-1	None known
`faad2` Ubuntu:Pro:14.04:LTS From an advisory covering 8 CVEs	before 2.7-8+deb8u3ubuntu0.1~esm1, plus listed versions 2.7-82.7-8+deb7u1build0.14.04.12.7-8+deb8u3build0.14.04.1~esm1	2.7-8+deb8u3ubuntu0.1~esm1
`faad2` Ubuntu:Pro:16.04:LTS From an advisory covering 8 CVEs	before 2.8.0~cvs20150510-1ubuntu0.1+esm1, plus listed versions 2.8.0~cvs20150510-12.8.0~cvs20150510-1ubuntu0.1	2.8.0~cvs20150510-1ubuntu0.1+esm1
`faad2` Ubuntu:Pro:18.04:LTS From an advisory covering 8 CVEs	before 2.8.8-1ubuntu0.1~esm1, plus listed versions 2.8.1-22.8.5-12.8.6-12.8.8-1	2.8.8-1ubuntu0.1~esm1
`faad2` Ubuntu:20.04:LTS From an advisory covering 8 CVEs	before 2.9.1-1ubuntu0.1, plus listed versions 2.8.8-3.22.9.0-12.9.1-1	2.9.1-1ubuntu0.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	affected, aliases, references	OSV
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-32273 is a high vulnerability (CVSS 7.8) in Faad2 Project Faad2, published September 20, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.15%, the 67th percentile. Fixed in faad2 2.10.1-r0.

References

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