CVE-2025-55648Public exploit

Application crash via unchecked Opus packet length

Published Jun 15, 2026 · Updated Jun 15, 2026

Heap buffer overflow in GPAC MP4Box 2.4 allows attackers to crash the application by supplying a crafted MP4 file. gf_opus_parse_packet_header reads Opus packet-header bytes without verifying that the sample buffer is long enough after corrupted stsz data declares an invalid sample size. The file must reach an Opus-dump path such as -dxml; no authentication is required, but a user or workflow must process the attacker-supplied file.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in GPAC MP4Box 2.4 allows attackers to crash the application by supplying a crafted MP4 file. gf_opus_parse_packet_header reads Opus packet-header bytes without verifying that the sample buffer is long enough after corrupted stsz data declares an invalid sample size. The file must reach an Opus-dump path such as -dxml; no authentication is required, but a user or workflow must process the attacker-supplied file.

The record

CVE
CVE-2025-55648
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, 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

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-122Heap-based Buffer Overflow
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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