CVE-2025-55639

CVSS 6.5 MEDIUMEPSS 0.4%CWE-476

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

23 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

GPAC MP4Box v2.4 was discovered to contain a NULL pointer dereference in the gf_isom_add_track_kind() function at isomedia/isom_write.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted MP4 file.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

n/a · n/a

References

https://github.com/gpac/gpac/commit/027ce139dda498ee95df36db9f9f6f3cadce8ec9 https://github.com/gpac/gpac/issues/3260 https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/23/23_poc.mp4 https://infosec.exchange/@sigdevel/116769184815236865 http://www.openwall.com/lists/oss-security/2026/06/26/2