NULL pointer dereference in Gpac

CVE-2025-55659

A NULL pointer dereference in the ctts_box_write function (isomedia/box_code_base.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.003 (25.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-55659: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Gpac — versions 2.4

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-55659?
CVE-2025-55659 is a medium-severity vulnerability in Gpac, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-06-09.
How severe is CVE-2025-55659?
Medium severity. CVSS v3 base score is 6.5 out of 10.