CVE-2025-55663Public exploit

Process crash via unchecked sample-entry pointer

Published Jun 15, 2026 · Updated Jun 15, 2026

NULL pointer dereference in GPAC MP4Box 2.4 allows attackers to crash the process by importing a crafted MP4 file. When an unknown svcC box appears inside an av01 parent, unsupported-box handling leaves a sample-entry pointer invalid, and Track_SetStreamDescriptor dereferences it during bitrate updating. Supplying the file requires no authentication or special privileges, but MP4Box must import it; successful triggering terminates that process without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in GPAC MP4Box 2.4 allows attackers to crash the process by importing a crafted MP4 file. When an unknown svcC box appears inside an av01 parent, unsupported-box handling leaves a sample-entry pointer invalid, and Track_SetStreamDescriptor dereferences it during bitrate updating. Supplying the file requires no authentication or special privileges, but MP4Box must import it; successful triggering terminates that process without reported data disclosure or modification.

The record

CVE
CVE-2025-55663
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3oss-security disclosureCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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