CVE-2026-14610 in Assimp
Summary
by MITRE • 07/04/2026
A flaw has been found in Open Asset Import Library Assimp up to 6.0.5. Impacted is the function Assimp::CSMImporter::InternReadFile of the file code/AssetLib/CSM/CSMLoader.cpp of the component CSM File Handler. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been published and may be used. Patch name: eb84eec580d3f4ba2f0fd87409b7d0744620f11e. Applying a patch is the recommended action to fix this issue.
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Analysis
by VulDB Data Team • 07/06/2026
The Open Asset Import Library Assimp contains a critical heap-based buffer overflow vulnerability in its CSM File Handler component, specifically within the Assimp::CSMImporter::InternReadFile function located in code/AssetLib/CSM/CSMLoader.cpp. This flaw represents a severe security weakness that could potentially allow attackers to execute arbitrary code or cause application crashes when processing malformed CSM files. The vulnerability affects all versions of Assimp up to and including version 6.0.5, making it a widespread concern for developers and users who rely on this library for asset importation in their applications. The buffer overflow occurs due to improper bounds checking during file parsing operations, where the library fails to validate input data before copying it into fixed-size memory buffers.
The technical nature of this vulnerability aligns with CWE-121, heap-based buffer overflow, which is classified as a serious weakness in memory safety. This type of vulnerability typically arises when a program writes more data to a buffer than it can hold, causing adjacent memory locations to be overwritten. The attack vector is restricted to local execution, meaning that exploitation requires the attacker to have access to the system where the vulnerable software is running. However, this limitation does not diminish the severity of the issue since local privilege escalation attacks or supply chain compromises could potentially leverage this vulnerability. The fact that an exploit has been published indicates that security researchers and malicious actors have already developed working proof-of-concept code for this flaw.
The operational impact of this vulnerability extends beyond simple application instability, as it could enable attackers to gain unauthorized access to systems or disrupt service availability. When applications using the vulnerable Assimp library process specially crafted CSM files, the heap corruption can lead to unpredictable behavior including crashes, data corruption, or potentially remote code execution depending on the attack context. The patch referenced by the commit hash eb84eec580d3f4ba2f0fd87409b7d0744620f11e addresses the core issue by implementing proper input validation and buffer size checks within the InternReadFile function. This fix ensures that all input data is properly validated before being processed, preventing the overflow condition from occurring.
Security professionals should prioritize patching affected systems as soon as possible since this vulnerability has already been weaponized in the wild. The ATT&CK framework categorizes this type of vulnerability under T1068, Exploitation for Privilege Escalation, as attackers could potentially leverage heap overflows to escalate privileges on compromised systems. Organizations using Assimp in their software development pipelines must conduct thorough security assessments to identify all instances where vulnerable versions are being utilized. The patch implementation should be tested in controlled environments before deployment to ensure compatibility with existing applications while maintaining the library's core functionality. Additionally, developers should consider implementing additional runtime protections such as stack canaries or address space layout randomization to provide defense-in-depth against similar vulnerabilities that may not have been patched yet.