CVE-2025-70067 Assimp CVE debrief

Who should care

Users and developers of Assimp, especially those handling FBX files, should be aware of this vulnerability and take steps to mitigate it. This includes reviewing Assimp deployments, validating FBX file inputs, and implementing security measures to prevent exploitation. Operators of affected platforms and security teams should assess potential exposure and prioritize remediation.

Technical summary

The vulnerability is caused by the use of strcpy() without runtime length validation when copying a property key string from a crafted FBX file into a fixed-size heap buffer in aiMaterial::AddBinaryProperty. This can lead to a buffer overflow, potentially allowing an attacker to execute arbitrary code. The issue arises from the FBX Importer's handling of binary properties, where the lack of input validation enables exploitation. To mitigate, ensure that all FBX file inputs are validated and sanitized before processing.

Defensive priority

High

Recommended defensive actions

• Update Assimp to a version that fixes this vulnerability
• Validate and sanitize FBX file inputs
• Implement additional security measures to prevent exploitation
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Evidence notes

The CVE record was published on 2026-05-04T14:16:29.350Z and was last modified on 2026-07-05T02:17:37.717Z. The NVD entry is currently Deferred. Evidence is limited to CVE and NVD information. Defenders should verify FBX file handling in Assimp and assess potential exposure.

Official resources