CVE-2026-9567

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

0.11% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 1.5% of scored records. A rank, not a probability.

NVD base score

1.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-07-23.

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

2026-05-26 17:45Z5 MO AGO

Last updated

2026-05-26 18:23Z5 MO AGO

Reserved

2026-05-26

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-404Improper Resource Shutdown or ReleaseClass
• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

8018586b36ee3196146566ec39c6f901084aa2176777170487ac16ee507135f7

• vuldb.comVDB-365629 | GPAC MP4Box isom_intern.c MergeFragment null pointer dereferencehttps://vuldb.com/vuln/365629vdb-entrytechnical-description
• vuldb.comVDB-365629 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/365629/ctisignaturepermissions-required
• vuldb.comSubmit #816075 | GPAC MP4Box <= 2.4.0 (master commit 7508ccc and earlier) Null pointer dereference (Denial of Service)https://vuldb.com/submit/816075third-party-advisory
• github.comhttps://github.com/gpac/gpac/issues/3549issue-tracking
• github.comhttps://github.com/user-attachments/files/27196918/poc.zipexploit
• github.comhttps://github.com/makesoftwaresafe/gpac/commit/525bf1af642c30af04e4df5345e6d798c0a4d8a1patch
• github.comhttps://github.com/gpac/gpac/product