Is CVE-2025-55639 in the CISA KEV catalog?

No. CVE-2025-55639 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-55639?

CVE-2025-55639 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2025-55639?

CVE-2025-55639 has an EPSS score of 0.35% (27th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-55639?

Upgrade gpac to 26.02.0 or later.

CVE & CISA-KEV Catalog

CVE-2025-55639

MEDIUM

6.5

CVSS v3

NVD

Description

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

gpacNVD

Affected:< 26.02.0Fixed in:26.02.0CVE-2025-55639derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

0.35%probability of exploitation in 30 days

27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Patch2

Exploit3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-30.