CVE-2026-36907Public exploit

Application crash via EC-3 atom over-read

Published Jun 26, 2026 · Updated Jun 26, 2026

Heap-buffer over-read in axiomatic-systems Bento4 before 1.8.9 allows attackers to crash MP4-processing applications via a crafted MP4 file. AP4_StsdAtom dispatches an encrypted audio sample entry to AP4_Dec3Atom, whose parser reads one byte past a 15-byte heap buffer while decoding the EC-3 configuration. Processing or opening an attacker-supplied file is required; the demonstrated consequence is an application abort, with no supported code-execution claim.

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

What happened

Heap-buffer over-read in axiomatic-systems Bento4 before 1.8.9 allows attackers to crash MP4-processing applications via a crafted MP4 file. AP4_StsdAtom dispatches an encrypted audio sample entry to AP4_Dec3Atom, whose parser reads one byte past a 15-byte heap buffer while decoding the EC-3 configuration. Processing or opening an attacker-supplied file is required; the demonstrated consequence is an application abort, with no supported code-execution claim.

The record

CVE
CVE-2026-36907
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
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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