CVE-2025-55639

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.51% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 43.3% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-12.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-23 00:00Z4 MO AGO

Last updated

2026-06-26 18:36Z4 MO AGO

Reserved

2025-08-13

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

377858ce2796b3053a5cb4c0e2a6e596512f7ef8ecdb6b0400fcbbf75a50d951

• github.comhttps://github.com/gpac/gpac/issues/3260
• github.comhttps://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/23/23_poc.mp4
• github.comhttps://github.com/gpac/gpac/commit/027ce139dda498ee95df36db9f9f6f3cadce8ec9
• infosec.exchangehttps://infosec.exchange/@sigdevel/116769184815236865
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/06/26/2