CVE-2021-40167

Memory corruption via unvalidated DWF file parsing

Published Jan 25, 2022 · Updated Aug 4, 2024

Memory corruption in Autodesk Design Review 2018 allows remote attackers to trigger a read access violation using a crafted DWF or PCT file. The DWF parser fails to validate user-supplied data before memory access, producing the corruption condition. The target must visit a malicious page or open the file; code execution occurs in the current process only when chained with another vulnerability.

CVSS severity7.8
High
EPSS probability7.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Autodesk Design Review 2018 allows remote attackers to trigger a read access violation using a crafted DWF or PCT file. The DWF parser fails to validate user-supplied data before memory access, producing the corruption condition. The target must visit a malicious page or open the file; code execution occurs in the current process only when chained with another vulnerability.

The record

CVE
CVE-2021-40167
Published
Jan 25, 2022
Updated
Aug 4, 2024
Vendor
Autodesk
Product
Autodesk Design Review
Classifications
CWE-125, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=2018

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Autodesk · Autodesk Design Reviewversion=2018

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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