Quick answers
- Is CVE-2025-55661 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-55661 being exploited in the wild.
- How severe is CVE-2025-55661?
- Informational severity, with a CVSS score of 0, published 15 June 2026.
- Which products and versions are affected?
- Gpac MP4Box 2.4.
- Is there a fix for CVE-2025-55661?
- 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-2025-55661 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2025-55661?
- 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 the Opus audio stream parser of GPAC MP4Box version 2.4. The flaw is triggered when the application processes a maliciously crafted MP4 file containing Opus audio data. An attacker can exploit this by inducing a user or automated system to open the file, leading to memory corruption and a subsequent application crash (Denial of Service). The vulnerability is local in nature as it requires the processing of a specific file. No official patch details were provided in the initial advisory, though users are advised to exercise caution with untrusted media files.
Affected products
- GPAC MP4Box 2.4
Timeline
- 2026-06-15: disclosed: CVE published to NVD