What is CVE-2025-55639?

CVE-2025-55639 is a medium-severity vulnerability in Gpac, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-06-23.

How severe is CVE-2025-55639?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Gpac

CVE-2025-55639

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.

EPSS: 0.004 (30.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Gpac
N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org (Exploit)
cve@mitre.org (Patch)
cve@mitre.org (Exploit, Patch, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2025-55639?: CVE-2025-55639 is a medium-severity vulnerability in Gpac, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-06-23.
How severe is CVE-2025-55639?: Medium severity. CVSS v3 base score is 6.5 out of 10.