CVE-2025-3549 Open Asset Import Library Assimp File MD3Loader.cpp ValidateSurfaceHeaderOffsets heap-based overflow
A heap-based buffer overflow in Assimp's MD3 loader allows local attackers to execute arbitrary code or cause denial of service via malicious files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-3549?
CVE-2025-3549 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp, published on 14 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability, which was classified as critical, was found in Open Asset Import Library Assimp 5.4.3. Affected is the function Assimp::MD3Importer::ValidateSurfaceHeaderOffsets of the file code/AssetLib/MD3/MD3Loader.cpp of the component File Handler. The manipulation leads to heap-based buffer overflow. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-3549?
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-2025-3549?
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-2025-3549 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3549 exists.
Other vulnerabilities in Open Asset Import Library Assimp
Sources
Also known as DEBIAN-CVE-2025-3549, GHSA-cxqg-678v-hmf9, PYSEC-2025-171, UBUNTU-CVE-2025-3549.