Security readout for executives and security teams
Plain-English summary
A malicious 3DS file or page could cause Bentley MicroStation CONNECT 10.16.0.80 to run attacker-controlled code when a user opens it. This is a workstation compromise risk for CAD users, not evidence of a remotely exploitable internet-facing service flaw.
Executive priority
Prioritize remediation for CAD workstations that process external 3DS content. The business risk is compromise of engineering endpoints and potentially sensitive design data, but exploitation requires user interaction.
Technical view
CVE-2021-46587 affects Bentley MicroStation CONNECT 10.16.0.80 3DS file parsing. The flaw is associated with CWE-416 and missing object-existence validation before object operations. Successful exploitation can execute code in the current process after user interaction.
Likely exposure
Exposure is likely limited to organizations running Bentley MicroStation CONNECT 10.16.0.80, especially engineering or design teams that receive 3DS files or links from external parties.
Exploitation context
Sources state exploitation requires the target to visit a malicious page or open a malicious file. The CVE is not listed as KEV, and the provided sources do not show active exploitation.
Researcher notes
Evidence supports a user-assisted code execution issue in the 3DS parser. The bundle identifies ZDI-CAN-15381 and CWE-416, but does not include exploit details, active exploitation evidence, or a specific fixed version.
Mitigation direction
- Review Bentley advisory BE-2021-0004 for fixed versions and vendor remediation guidance.
- Update affected MicroStation CONNECT 10.16.0.80 installations per Bentley guidance.
- Restrict opening 3DS files from untrusted or unsolicited sources.
- Handle external CAD files in isolated, least-privileged workstation workflows.
- Use endpoint detection and email/web filtering around CAD file delivery.
Validation and detection
- Inventory MicroStation CONNECT installations and confirm any 10.16.0.80 systems.
- Check whether Bentley BE-2021-0004 remediation has been applied.
- Identify teams that open 3DS files from customers, suppliers, or public sources.
- Review endpoint telemetry for suspicious activity around MicroStation processes.
- Confirm user awareness controls for unsolicited CAD files and links.
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-416: 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-2021-46587 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-2021-0004CVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-22-174/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.