CVE-2025-2756 Open Asset Import Library Assimp AC3D File ACLoader.cpp ConvertObjectSection heap-based overflow
A heap-based buffer overflow in Assimp's AC3D importer allows remote attackers to execute arbitrary code or cause denial of service via malicious files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-2756?
CVE-2025-2756 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp, published on 25 Mar 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability classified as critical has been found in Open Asset Import Library Assimp 5.4.3. This affects the function Assimp::AC3DImporter::ConvertObjectSection of the file code/AssetLib/AC/ACLoader.cpp of the component AC3D File Handler. The manipulation of the argument tmp leads to heap-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-2756?
1 open source package ship an affected version, including pyassimp. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pyassimp PyPI | All versions to 5.4.3 | None |
Products include Assimp Assimp.
How do I fix CVE-2025-2756?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-2756 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-2756 exists.
Other vulnerabilities in Open Asset Import Library Assimp
Sources
Also known as DEBIAN-CVE-2025-2756, GHSA-cvwm-xr4j-jf5j, PYSEC-2025-167, UBUNTU-CVE-2025-2756.