What’s Vulnerable › Vulnerabilities

CVE-2025-6120: Open Asset Import Library Assimp HL1MDLLoader.cpp read_meshes heap-based overflow

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-16 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• Open Asset Import Library Assimp: through 5.4.3

References

• https://github.com/assimp/assimp/issues/6220
• https://github.com/assimp/assimp/issues/6220#issuecomment-2945018579
• https://github.com/user-attachments/files/20605340/read_meshes_reproduce.tar.gz
• https://vuldb.com/?ctiid.312589
• https://vuldb.com/?id.312589
• https://vuldb.com/?submit.591235

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