CVE-2021-40156

Name: CVE-2021-40156
Creator: NVD / NIST
Published: 2021-09-15T17:15:10.693+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.96%

Last modified Jun 17, 2026

CVE-2021-40156 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.96% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.96%

56.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Autodesk	Navisworks	2019
Autodesk	Navisworks	2020
Autodesk	Navisworks	2021
Autodesk	Navisworks	2022

References

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

Timeline

Published: Sep 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40156?

How severe is CVE-2021-40156?

CVE-2021-40156 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40156?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-40156?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST