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PatchSiren cyber security CVE debrief

CVE-2025-70067 Assimp CVE debrief

A critical buffer overflow vulnerability exists in Assimp versions up to 6.0.2 in the FBX Importer. The vulnerability occurs in aiMaterial::AddBinaryProperty, where a property key string from a crafted FBX file is copied into a fixed-size heap buffer using strcpy() without runtime length validation. This issue allows potential attackers to execute arbitrary code by exploiting the buffer overflow. Users and developers should prioritize mitigation strategies.

Vendor
Assimp
Product
Assimp
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-04
Original CVE updated
2026-07-05
Advisory published
2026-05-04
Advisory updated
2026-07-05

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-70067 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-70067

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-70067 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-70067

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.