Security readout for executives and security teams
Plain-English summary
A malicious JT design file can make Bentley MicroStation CONNECT 10.16.0.80 run attacker-controlled code when a user opens the file or visits a malicious page. This is mainly a workstation and document-handling risk, not an unauthenticated internet service issue.
Executive priority
Treat this as high priority if Bentley MicroStation is used in design workflows with external files. The business risk is endpoint compromise through routine file handling, though urgency is lower than a remotely exposed server flaw because user interaction is required.
Technical view
The flaw is a CWE-125 out-of-bounds read in JT file parsing. Crafted JT data can trigger a read past an allocated buffer and may lead to arbitrary code execution in the current MicroStation process. The CVSS v3.0 score is 7.8 with required user interaction.
Likely exposure
Exposure is limited to environments running Bentley MicroStation CONNECT 10.16.0.80, especially teams that receive JT files from customers, suppliers, contractors, or public sources. The bundle does not identify other affected Bentley versions or products.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires user interaction, such as opening a malicious file or visiting a malicious page, but successful exploitation could compromise the user’s workstation context.
Researcher notes
ZDI tracked this as ZDI-CAN-14987 and ZDI-22-149. The available description names JT parsing, an out-of-bounds read, and potential code execution, but does not provide patch version details in the supplied bundle.
Mitigation direction
- Identify MicroStation CONNECT 10.16.0.80 installations and prioritize them for review.
- Check Bentley advisory BE-2021-0005 for vendor-supported updates or mitigations.
- Limit opening JT files from untrusted or unexpected sources.
- Use endpoint controls to inspect or quarantine externally received CAD exchange files.
- Run MicroStation workstations with least privilege where operationally feasible.
Validation and detection
- Confirm installed MicroStation CONNECT versions on engineering and design workstations.
- Compare remediation status against Bentley advisory BE-2021-0005.
- Review email, portal, and file-sharing paths that deliver JT files to users.
- Verify endpoint telemetry covers MicroStation crashes or suspicious child-process behavior.
- Confirm users handling external JT files have current phishing and file-handling 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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-125: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
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-2021-46562 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-22-149/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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.