Security readout for executives and security teams
Plain-English summary
Bentley MicroStation CONNECT 10.16.0.80 can be crashed or controlled through a malicious JT file. An attacker must convince a user to open a crafted file or visit a malicious page. Successful exploitation could run code with the user’s privileges, creating serious workstation and project-data risk.
Executive priority
Treat this as a high-priority workstation risk for teams using MicroStation and external CAD files. Prioritize inventory, vendor-guided remediation, and controls around untrusted project files.
Technical view
The flaw is in JT file parsing and is classified as CWE-416. The CVSS 3.0 score is 7.8, with user interaction required and high confidentiality, integrity, and availability impact. The source bundle identifies Bentley MicroStation CONNECT 10.16.0.80 as affected.
Likely exposure
Exposure is most likely on engineering or design workstations running MicroStation CONNECT 10.16.0.80, especially where users exchange, import, or review JT files from external parties.
Exploitation context
The bundle does not show KEV listing or cited active exploitation. Exploitation requires user interaction, but phishing, project file exchanges, or malicious web delivery could make that realistic in design environments.
Researcher notes
The CVSS vector is local with user interaction, despite the advisory language describing remote attackers. The practical attack path is malicious content handling. Patch details are not included in the bundle, so fixed-version claims should be verified directly with Bentley.
Mitigation direction
- Inventory MicroStation CONNECT installations and identify version 10.16.0.80.
- Review Bentley BE-2021-0005 for vendor-supported updates or mitigations.
- Restrict opening JT files from untrusted or unsolicited sources.
- Use least-privilege accounts for design workstations.
- Monitor endpoint alerts involving MicroStation and unusual child processes.
Validation and detection
- Confirm installed MicroStation CONNECT versions on engineering workstations.
- Check whether JT file handling is needed for exposed workflows.
- Verify remediation status against Bentley advisory BE-2021-0005.
- Review email, web, and endpoint telemetry for suspicious JT file delivery.
- Confirm users handling external CAD data have current security guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-416: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-46601 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.8HighVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.bentley.com/en/common-vulnerability-exposure/BE-2021-0005CVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-22-188/CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.