How severe is CVE-2021-40161?

CVE-2021-40161 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-40161 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40161?

CVE-2021-40161 primarily affects Autodesk Revit. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40161?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-40161 published?

CVE-2021-40161 was published on 2021-12-23 and last updated on 2026-06-17.

CVE-2021-40161

CVE-2021-40161 is a high-severity vulnerability in Autodesk Revit with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.4
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Autodesk Revit
Published: 2021-12-23
Last modified: 2026-06-17

Description

A Memory Corruption vulnerability may lead to code execution through maliciously crafted DLL files through PDFTron earlier than 9.0.7 version.

Frequently asked questions

What is CVE-2021-40161?: A Memory Corruption vulnerability may lead to code execution through maliciously crafted DLL files through PDFTron earlier than 9.0.7 version.
How severe is CVE-2021-40161?: CVE-2021-40161 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-40161 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40161?: CVE-2021-40161 primarily affects Autodesk Revit. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40161?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-40161 published?: CVE-2021-40161 was published on 2021-12-23 and last updated on 2026-06-17.

References

https://www.autodesk.com/trust/security-advisories/adsk-sa-2021-0010

Affected products (24)

cpe:2.3:a:autodesk:revit:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:navisworks:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:advance_steel:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_architecture:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_electrical:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_map_3d:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_mechanical:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_mep:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_plant_3d:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_lt:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:civil_3d:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad:*:*:*:*:*:macos:*:*
cpe:2.3:a:autodesk:autocad:2020:*:*:*:*:macos:*:*
cpe:2.3:a:autodesk:autocad:2021:*:*:*:*:macos:*:*
cpe:2.3:a:autodesk:autocad:2022:*:*:*:*:macos:*:*
cpe:2.3:a:autodesk:autocad_lt:*:*:*:*:*:macos:*:*
cpe:2.3:a:autodesk:autocad_lt:2020:*:*:*:*:macos:*:*
cpe:2.3:a:autodesk:autocad_lt:2021:*:*:*:*:macos:*:*
cpe:2.3:a:autodesk:design_review:2018:-:*:*:*:*:*:*
cpe:2.3:a:autodesk:design_review:2018:hotfix:*:*:*:*:*:*
cpe:2.3:a:autodesk:design_review:2018:hotfix2:*:*:*:*:*:*
cpe:2.3:a:autodesk:design_review:2018:hotfix3:*:*:*:*:*:*
cpe:2.3:a:autodesk:design_review:2018:hotfix4:*:*:*:*:*:*

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