Quick answers
- Is CVE-2025-55645 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-55645 being exploited in the wild.
- How severe is CVE-2025-55645?
- Informational severity, published 15 June 2026.
- Which products and versions are affected?
- Gpac MP4Box 2.4.
- Is there a fix for CVE-2025-55645?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2025-55645 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2025-55645?
- Check whether you run Gpac MP4Box at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap buffer overflow vulnerability exists in GPAC MP4Box v2.4 within the gf_cenc_set_pssh function located in isomedia/drm_sample.c. The flaw is triggered when the application processes Common Encryption (CENC) Protection System Specific Header (PSSH) data in a malformed MP4 file. An attacker can exploit this by inducing a user or automated system to open a crafted file, leading to memory corruption and a subsequent application crash (Denial of Service). While the primary impact is DoS, heap overflows can sometimes be leveraged for further exploitation depending on the memory layout. No patch is explicitly detailed in the advisory, though users should exercise caution with untrusted media files.
Affected products
- GPAC MP4Box 2.4
Timeline
- 2026-06-15: disclosed: Initial publication of the CVE record.
- 2026-06-15: advisory: NVD record published.