CVE-2025-55649Public exploit

Application crash via unchecked ESD URL pointer

Published Jun 15, 2026 · Updated Jun 15, 2026

NULL pointer dereference in GPAC MP4Box 2.4 allows attackers to crash the application by processing a crafted MP4 file. The gf_media_map_esd function passes the unvalidated esd->URLString pointer from corrupted Elementary Stream Descriptor data to strlen, which reads address zero when the field is absent. Exploitation requires a crafted file to be supplied and processed during fragmentation, interrupting only the MP4Box process.

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 application by processing a crafted MP4 file. The gf_media_map_esd function passes the unvalidated esd->URLString pointer from corrupted Elementary Stream Descriptor data to strlen, which reads address zero when the field is absent. Exploitation requires a crafted file to be supplied and processed during fragmentation, interrupting only the MP4Box process.

The record

CVE
CVE-2025-55649
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1204.002
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

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

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.

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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
T1204.002Malicious File

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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