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Fencer Vulns
low 3.3

CVE-2021-27040 json

A maliciously crafted DWG file can be forced to read beyond allocated boundaries when parsing the DWG file.

published 2021-06-25 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13811

cvss
3.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

A maliciously crafted DWG file can be forced to read beyond allocated boundaries when parsing the DWG file. This vulnerability can be exploited to execute arbitrary code.

Patch / fix

  • autodesk advance_steel 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk autocad 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk autocad_architecture 2019.1.3, 2020.1.4, 2021.1.1
  • autodesk autocad_electrical 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk autocad_lt 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk autocad_map_3d 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk autocad_mechanical 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk autocad_mep 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk autocad_plant_3d 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk civil_3d 2019.1.3, 2020.1.4, 2021.1.1, 2022.0.1
  • autodesk dwg_trueview 2022.1.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-294-01 updated cvss 3.3

ICONICS GENESIS64 and Mitsubishi Electric MC Works64

  • ICONICS, Mitsubishi Electric GENESIS64 <= 10.97 ICONICS, Mitsubishi Electric MC Works64 <= 4.04E
    affected: mitigation “ICONICS and Mitsubishi Electric are releasing Critical Fix Rollups or patches for these products. GENESIS64 Version 10.97.1 and later will not be vulnerable to this exploit.” mitsubishielectric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.74% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • n/a Autodesk Advanced Steel, Civil 3D, AutoCAD, AutoCAD LT, AutoCAD Architecture, AutoCAD Electrical, AutoCAD Map 3D, AutoCAD Mechanical, AutoCAD MEP, AutoCAD Plant 3D

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.