CVE Intelligence
High Memory corruption

CVE-2021-40158 — A maliciously crafted JT file in Autodesk Inventor 2022, 2021, 2020, 2019 may be forced to read...

A maliciously crafted JT file in Autodesk Inventor 2022, 2021, 2020, 2019 and AutoCAD 2022 may be forced to read beyond allocated boundaries when parsing the JT file. This vulnerability in conjunction with other vulnerabilities could lead to code execution in the context of the current process.

Published Jan 25, 2022 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: autodesk

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 2.9% (30-day exploitation probability)+13
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
2.89%
ahead of 87% of scored CVEs · Oct 14, 2026
Affects
Autodesk
Advance Steel and 10 more
CVSS base
7.8
High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Autodesk Advance Steel, Autodesk Autocad, Autodesk Autocad Architecture…).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
  4. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Autodesk Advance Steel ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Autocad ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Autocad Architecture ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Autocad Electrical ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Autocad Lt ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Autocad Map 3d ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Autocad Mechanical ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Autocad Mep ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Autocad Plant 3d ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Civil 3d ≥ 2022 and < 2022.1.2 Vulnerable NIST National Vulnerability Database
Autodesk Inventor ≥ 2022 and < 2022.2version 2019version 2020version 2021 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.8 CVSS 3.1 High 1.8 5.9 nvd@nist.gov via NIST National Vulnerability Database
7.8 CVSS 3.1 High — — GitHub, Inc. via GitHub Security Advisories
6.8 CVSS 2.0 Medium 8.6 6.4 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-125 · Out-of-bounds Read

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 2.89%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
  • Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
endpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

  • 2026
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • CVSS changed · 7.8
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • 2022
  • CVE published
    Jan 25, 2022 · autodesk

Source activity

Repeated readings are counted rather than listed.

  • 1× References added · Oct 13, 2026 – Oct 13, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

45 on the record

Elsewhere on this site

Autodesk
every CVE for this vendor
Memory corruption
same class
CWE-125
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-7405 Out-of-bounds Read in Autodesk Advance Steel Aug 6, 2026
  • CVE-2026-7406 Untrusted Pointer Dereference in Autodesk Advance Steel Aug 6, 2026
  • CVE-2026-17550 DWG or DXF File Parsing Out-of-Bounds Read in Autodesk AutoCAD Jul 29, 2026
  • CVE-2026-16463 DXF File Parsing Heap-Based Overflow in Autodesk AutoCAD Jul 29, 2026
  • CVE-2026-16465 DWG or DXF File Parsing Out-of-Bounds Read in Autodesk AutoCAD Jul 29, 2026
  • CVE-2025-10898 MODEL File Parsing Out-of-Bounds Write Vulnerability Dec 15, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2021-40158 is "A maliciously crafted JT file in Autodesk Inventor 2022, 2021, 2020, 2019 may be forced to read...", rated High. It affects Advance Steel (Autodesk); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.8 describes technical severity. EPSS 2.89% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.

Sign in or create an account to comment and suggest corrections.