CVE-2025-2750 Open Asset Import Library Assimp CSM File CSMLoader.cpp InternReadFile out-of-bounds write
A remote attacker can trigger an out-of-bounds write in the Assimp library via a malicious CSM file, potentially leading to code execution or denial of service.
- 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-2025-2750?
CVE-2025-2750 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, which was classified as critical, was found in Open Asset Import Library Assimp 5.4.3. This affects the function Assimp::CSMImporter::InternReadFile of the file code/AssetLib/CSM/CSMLoader.cpp of the component CSM File Handler. The manipulation leads to out-of-bounds write. 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-2025-2750?
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-2025-2750?
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-2025-2750 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-2750 exists.
Other vulnerabilities in Open Asset Import Library Assimp
Sources
Also known as DEBIAN-CVE-2025-2750, GHSA-6x45-4j6r-r8x8, OESA-2026-2455, OESA-2026-2456, OESA-2026-2457, OESA-2026-2521 and 2 more.