Security readout for executives and security teams
Plain-English summary
CVE-2021-46563 affects Bentley MicroStation CONNECT 10.16.0.80. A malicious JT file or page could cause code execution when opened by a user. This matters most where engineering users exchange CAD or JT files with outside parties.
Executive priority
Treat as high priority for organizations using affected MicroStation versions in external file workflows. Prioritize inventory and vendor-guided remediation over emergency response unless internal evidence suggests attempted exploitation.
Technical view
The flaw is a CWE-125 out-of-bounds read in JT file parsing. Crafted JT data can read past an allocated buffer and may allow arbitrary code execution in the current MicroStation process. CVSS is 7.8 high with required user interaction.
Likely exposure
Exposure is likely limited to organizations running Bentley MicroStation CONNECT 10.16.0.80, especially engineering, design, and construction teams that open externally supplied JT files or related links.
Exploitation context
The sources describe remote attacker-triggered code execution but require user interaction. The CVE is not marked KEV in the provided bundle, and no cited source states active exploitation.
Researcher notes
Evidence supports affected version, JT parser flaw class, user interaction, and potential code execution. The provided bundle does not name a fixed version or detailed mitigation, so remediation should be verified against Bentley guidance.
Mitigation direction
- Inventory and prioritize Bentley MicroStation CONNECT 10.16.0.80 installations.
- Check Bentley advisory BE-2021-0005 for vendor-approved fixes or mitigations.
- Restrict opening untrusted JT files until remediation is confirmed.
- Use least-privilege execution for MicroStation users where operationally feasible.
- Reinforce controls for externally supplied CAD and JT files.
Validation and detection
- Confirm whether any endpoints run MicroStation CONNECT 10.16.0.80.
- Identify teams receiving JT files from external sources.
- Check whether Bentley remediation from BE-2021-0005 has been applied.
- Review endpoint telemetry for MicroStation crashes involving JT files.
- Verify file-handling controls cover unsolicited JT attachments and downloads.
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-2021-46563 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-22-150/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.