CVE-2025-70067

Heap corruption via unbounded material key copy

Published May 4, 2026 · Updated May 4, 2026

Heap buffer overflow in Assimp 6.0.2 and earlier allows context-dependent attackers to corrupt memory by supplying a crafted FBX file. The FBX importer passes an overlong material property key to aiMaterial::AddBinaryProperty, where an assertion-only length check precedes an unbounded strcpy into fixed-size aiString storage. The overflow is reachable when an application imports the file in a release-style build with assertions disabled, and the resulting memory corruption can crash the importing process.

CVSS severity9.8
Critical
EPSS probability0.34%
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 Assimp 6.0.2 and earlier allows context-dependent attackers to corrupt memory by supplying a crafted FBX file. The FBX importer passes an overlong material property key to aiMaterial::AddBinaryProperty, where an assertion-only length check precedes an unbounded strcpy into fixed-size aiString storage. The overflow is reachable when an application imports the file in a release-style build with assertions disabled, and the resulting memory corruption can crash the importing process.

The record

CVE
CVE-2025-70067
Published
May 4, 2026
Updated
May 4, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, T1204.002
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. May 4, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 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 vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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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