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PatchSiren cyber security CVE debrief

CVE-2025-55657 GPAC CVE debrief

CVE-2025-55657 is a HIGH severity vulnerability in GPAC MP4Box v2.4. A NULL pointer dereference in the gf_odf_vvc_cfg_write_bs function (odf/descriptors.c) allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file. The vulnerability has a CVSS score of 7.5 and was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2025-55657).

Vendor
GPAC
Product
MP4Box
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-14
Advisory published
2026-06-09
Advisory updated
2026-06-14

Who should care

Users of GPAC MP4Box v2.4 should update to a patched version to prevent potential Denial of Service (DoS) attacks.

Technical summary

The vulnerability is caused by a NULL pointer dereference in the gf_odf_vvc_cfg_write_bs function (odf/descriptors.c) of GPAC MP4Box v2.4. This can be exploited by supplying a crafted MP4 file, potentially leading to a Denial of Service (DoS).

Defensive priority

HIGH

Recommended defensive actions

  • Update GPAC MP4Box to a patched version.
  • Restrict access to MP4Box to trusted sources only.
  • Monitor for suspicious MP4 file uploads or processing.

Evidence notes

The vulnerability is confirmed by the official CVE record [cve-org](https://www.cve.org/CVERecord?id=CVE-2025-55657) and NVD detail [nvd](https://nvd.nist.gov/vuln/detail/CVE-2025-55657).

Sources and references

Verified primary and authoritative sources

  • CVE-2025-55657 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-55657

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-55657 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-55657

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.