Security readout for executives and security teams
Plain-English summary
CVE-2021-46612 is a high-severity code execution flaw in Bentley MicroStation CONNECT 10.16.0.80. A victim must open a malicious PDF-related file or visit a malicious page. Successful exploitation could run attacker code with the user’s privileges, putting engineering workstations and project files at risk.
Executive priority
Treat this as a priority workstation risk for engineering environments, not a broad internet-facing emergency. The impact is serious because code execution could expose sensitive designs, but exploitation needs user interaction and a vulnerable MicroStation version.
Technical view
The flaw is in PDF parsing and is classified as CWE-125. Crafted PDF data can cause a read past the end of an allocated buffer, which the advisory says can be leveraged for arbitrary code execution in the current process. CVSS v3.0 is 7.8: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Likely exposure
Exposure is most likely on workstations running Bentley MicroStation CONNECT 10.16.0.80, especially where users handle externally supplied PDFs or design files. The bundle does not identify other affected Bentley versions or products.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires user interaction, so the practical path is social delivery of a malicious page or file rather than unauthenticated network exploitation.
Researcher notes
Evidence supports Bentley MicroStation CONNECT 10.16.0.80 only. ZDI tracks this as ZDI-22-199 and ZDI-CAN-15406. The bundle does not provide exploit maturity, fixed versions, or proof of active exploitation, so those points should remain unasserted.
Mitigation direction
- Identify systems running MicroStation CONNECT 10.16.0.80.
- Review Bentley advisory BE-2021-0003 for vendor updates or mitigations.
- Limit opening externally supplied PDFs in affected MicroStation installations.
- Use email, web, and attachment controls for untrusted design-related files.
- Prioritize remediation for engineering users handling client or vendor files.
Validation and detection
- Confirm installed MicroStation CONNECT versions on CAD workstations.
- Check whether affected users process external PDFs or project files.
- Verify Bentley advisory guidance has been applied where relevant.
- Review endpoint alerts for suspicious child processes from MicroStation.
- Document any compensating controls for delayed remediation.
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-2021-46612 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-2021-0003CVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-22-199/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.