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VulnerabilityPublished

CVE-2025-6120: Open Asset Import Library Assimp · Heap-based Buffer Overflow

Affects Open Asset Import Library AssimpSource CVE Database V5

0

Not known to be exploited · CVSS 4.8 Medium.

Data as of 26 Oct 2026, 09:08 UTC

CVSS 4.0 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Jun 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubassimp/assimppkg:github/assimp/assimpOther threatsAffected
  • =5.4.0
  • =5.4.1
  • =5.4.2
  • =5.4.3
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

1. Immediate mitigation involves upgrading Assimp to a version beyond 5.4.3 once patches addressing this vulnerability are released. 2. In the interim, restrict local access to systems running vulnerable Assimp versions to trusted users only, minimizing the risk of local exploitation. 3. Employ application-level sandboxing or containerization to limit the impact of potential memory corruption caused by exploitation. 4. Conduct thorough code audits and fuzz testing on any custom software integrating Assimp to identify and mitigate similar memory handling issues. 5. Implement strict input validation and sanitization on 3D model files before processing to reduce malformed input risks. 6. Monitor system logs and application behavior for signs of crashes or anomalous activity related to 3D asset processing. 7. Educate developers and security teams about the risks associated with third-party libraries like Assimp and incorporate dependency vulnerability scanning into the software development lifecycle.

Description

A vulnerability classified as critical was found in Open Asset Import Library Assimp up to 5.4.3. Affected by this vulnerability is the function read_meshes in the library assimp/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.

References

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