CVE-2025-55643

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-06-15 · updated 2026-10-12
Weakness: CWE-476

Description

A NULL pointer dereference in the TrackWriter handling component (filters/mux_isom.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.

Affected products

GPAC: before 26.02.0 — fixed in 26.02.0

How to fix

Upgrade to a fixed version: GPAC 26.02.0. Check the vendor advisory for mitigations.

References

https://infosec.exchange/@sigdevel/116736819671963019
http://www.openwall.com/lists/oss-security/2026/06/13/5

Get alerted when CVE-2025-55643 or the next vulnerability affects your stack