CVE-2025-11275 identifies a heap-based buffer overflow vulnerability in the Open Asset Import Library (Assimp) version 6.0.2, a widely used open-source library for importing various 3D model formats. The vulnerability resides in the ODDLParser::getNextSeparator function within the OpenDDLParserUtils.h file. This function improperly handles input parsing, leading to a heap-based buffer overflow when processing malformed or malicious data. The overflow can corrupt memory, potentially allowing an attacker to execute arbitrary code or cause a denial of service. Exploitation requires local access with low privileges, does not require user interaction, and the attack complexity is low. The CVSS 4.0 vector indicates local attack vector (AV:L), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and impacts on confidentiality, integrity, and availability at low levels. Although the exploit is publicly available, no known widespread exploitation has been reported. The lack of official patches or mitigation guidance at the time of publication increases the urgency for affected users to implement workarounds or update when available. This vulnerability is particularly relevant for developers and organizations embedding Assimp 6.0.2 in their applications or workflows involving 3D asset processing.

The heap-based buffer overflow can lead to memory corruption, which may allow attackers to execute arbitrary code, crash applications, or cause denial of service. Since exploitation requires local access, the threat is primarily to systems where untrusted users have some level of access, such as shared development environments or compromised user accounts. The vulnerability affects confidentiality by potentially exposing sensitive data in memory, integrity by enabling code execution or data manipulation, and availability by causing application crashes. Organizations relying on Assimp 6.0.2 for 3D model processing in software development, game development, or digital content pipelines may face operational disruptions or security breaches if exploited. The medium CVSS score reflects the limited attack vector but acknowledges the potential damage from successful exploitation. The presence of a public exploit increases the risk of opportunistic attacks, especially in environments with inadequate access controls or monitoring.

1. Immediately restrict local access to systems running Assimp 6.0.2 to trusted users only, minimizing the risk of local exploitation. 2. Monitor and audit local user activities for suspicious attempts to process malformed 3D assets or unusual application crashes. 3. Where possible, isolate or sandbox applications using Assimp to limit the impact of potential memory corruption. 4. Apply input validation and sanitization on all 3D asset files before processing with Assimp to prevent malformed data from triggering the vulnerability. 5. Track vendor announcements for official patches or updates and plan prompt deployment once available. 6. Consider upgrading to a later version of Assimp if it addresses this vulnerability or using alternative libraries with similar functionality and better security posture. 7. Employ runtime protections such as heap canaries, address space layout randomization (ASLR), and control flow integrity (CFI) to mitigate exploitation impact. 8. Educate developers and system administrators about the vulnerability and enforce secure coding and deployment practices around third-party libraries.