How severe is CVE-2021-40166?

CVE-2021-40166 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-2021-40166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40166?

CVE-2021-40166 primarily affects Autodesk Autocad. In total, 41 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40166?

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-2021-40166 published?

CVE-2021-40166 was published on 2022-10-07 and last updated on 2026-06-17.

CVE-2021-40166

CVE-2021-40166 is a high-severity vulnerability in Autodesk Autocad 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-416.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-416
Affected product: Autodesk Autocad
Published: 2022-10-07
Last modified: 2026-06-17

Description

A maliciously crafted PNG file in Autodesk Image Processing component may be used to attempt to free an object that has already been freed while parsing them. This vulnerability may be exploited by attackers to execute arbitrary code.

Frequently asked questions

What is CVE-2021-40166?: A maliciously crafted PNG file in Autodesk Image Processing component may be used to attempt to free an object that has already been freed while parsing them. This vulnerability may be exploited by attackers to execute arbitrary code.
How severe is CVE-2021-40166?: CVE-2021-40166 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-2021-40166 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40166?: CVE-2021-40166 primarily affects Autodesk Autocad. In total, 41 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40166?: 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-2021-40166 published?: CVE-2021-40166 was published on 2022-10-07 and last updated on 2026-06-17.

References

https://www.autodesk.com/trust/security-advisories/adsk-sa-2021-0011

Affected products (41)

cpe:2.3:a:autodesk:autocad:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_advance_steel:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_architecture:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_civil_3d:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_electrical:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_lt:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:autocad_lt:*:*:*:*:*:macos:*:*
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: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:dwg_trueview:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:fusion:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:infrastructure_parts_editor:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:infrastructure_parts_editor:2021:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:infrastructure_parts_editor:2022:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2019.3:-:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2019.3:hotfix_1:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2019.3:hotfix_2:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2019.3:hotfix_3:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2020.2:-:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2020.2:hotfix_1:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2020.2:hotfix_2:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2021.2:-:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2021.2:hotfix_1:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2021.2:hotfix_2:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2022.0:-:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2022.0:hotfix_1:*:*:*:*:*:*
cpe:2.3:a:autodesk:infraworks:2022.1:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:inventor:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:navisworks:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:revit:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:revit:2022:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:storm_and_sanitary_analysis:*:*:*:*:*:*:*:*
cpe:2.3:a:autodesk:storm_and_sanitary_analysis:2019:*:*:*:*:*:*:*

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