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

Quick assessment

Affected
Open Asset Import Library Assimp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open Asset Import Library Assimp是Open Asset Import Library开源的一个官方开放资产导入库存储库。可将40多种3D文件格式加载到一个统一且干净的数据结构中。 Open Asset Import Library Assimp 5.4.3及之前版本存在安全漏洞，该漏洞源于函数read_meshes存在堆缓冲区溢出。

CVSS 5.3 · Medium EPSS 0.26% · P16
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I. Basic Information for CVE-2025-6120

Vulnerability Information
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Vulnerability Title
Open Asset Import Library Assimp HL1MDLLoader.cpp read_meshes heap-based overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Open Asset Import Library Assimp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open Asset Import Library Assimp是Open Asset Import Library开源的一个官方开放资产导入库存储库。可将40多种3D文件格式加载到一个统一且干净的数据结构中。 Open Asset Import Library Assimp 5.4.3及之前版本存在安全漏洞，该漏洞源于函数read_meshes存在堆缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Open Asset Import Library Assimp 5.4.0 -

II. Public POCs for CVE-2025-6120

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III. Intelligence Information for CVE-2025-6120

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Vendor Advisories for CVE-2025-6120 (1)

Proof of Concept for CVE-2025-6120 (1)

News Coverage for CVE-2025-6120 (1)

Other References for CVE-2025-6120 (1)

IV. Related Vulnerabilities

Same product: Assimp
Same vendor: Open Asset Import Library
Same weakness: CWE-122

V. Comments for CVE-2025-6120

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