Security readout for executives and security teams
Plain-English summary
CVE-2021-46568 is a high-severity code execution flaw in Bentley MicroStation CONNECT 10.16.0.80. An attacker must convince a user to open a malicious JT file or visit a malicious page. Successful exploitation could run code with that user's application privileges.
Executive priority
Treat this as a targeted workstation risk for teams handling engineering files. Prioritize affected design environments and externally sourced JT workflows, but do not assume internet-wide exploitation from the provided evidence.
Technical view
The flaw is a CWE-787 out-of-bounds write in JT file parsing. Crafted JT data can write past an allocated buffer and allow arbitrary code execution in the current process. The source bundle names MicroStation CONNECT 10.16.0.80 as affected.
Likely exposure
Exposure is most likely in engineering, CAD, architecture, construction, or infrastructure teams using Bentley MicroStation CONNECT 10.16.0.80 and receiving JT files from external parties.
Exploitation context
The sources require user interaction and do not show CISA KEV listing or active exploitation evidence. Practical risk centers on malicious files or pages delivered through email, portals, shared drives, or partner workflows.
Researcher notes
Evidence is limited to the CVE description and advisories. The core issue is JT parser memory corruption leading to code execution after user interaction. No exploit status, fixed version, or detailed mitigation is provided in the source bundle.
Mitigation direction
- Inventory Bentley MicroStation CONNECT installations and identify version 10.16.0.80.
- Review Bentley BE-2021-0005 for vendor-approved fixes or mitigations.
- Limit opening JT files from untrusted or external sources.
- Apply vendor updates when confirmed by Bentley guidance.
- Use endpoint controls to flag suspicious MicroStation child processes or crashes.
Validation and detection
- Confirm whether MicroStation CONNECT 10.16.0.80 exists in the environment.
- Identify teams or workflows that open JT files from external sources.
- Check whether Bentley BE-2021-0005 remediation has been applied.
- Review EDR and crash telemetry for suspicious MicroStation behavior.
- Confirm user training covers unexpected CAD/JT file handling.
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-787: 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-2021-46568 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-22-155/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 Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.