Security readout for executives and security teams
Plain-English summary
A malicious 3DS model file can make Bentley MicroStation CONNECT 10.16.0.80 run attacker-controlled code. The victim must open a crafted file or visit a malicious page, so this is mainly a threat to design workstations handling external files.
Executive priority
Treat this as high priority for engineering and design environments that process outside files. It is not described as wormable, but successful exploitation could compromise a workstation and sensitive project data.
Technical view
The flaw is a CWE-787 out-of-bounds write in MicroStation CONNECT 10.16.0.80 3DS file parsing. Crafted 3DS data can write past an allocated buffer and enable code execution in the current process context. CVSS is 7.8 high with user interaction required.
Likely exposure
Organizations using Bentley MicroStation CONNECT 10.16.0.80, especially teams importing 3DS files from customers, contractors, public sources, or email attachments, are the likely exposure group.
Exploitation context
The source bundle does not indicate CISA KEV listing or confirmed active exploitation. Exploitation requires user interaction through a malicious file or page and would execute with the affected user's application privileges.
Researcher notes
Evidence supports an out-of-bounds write in 3DS parsing with RCE impact. The bundle does not provide exploit details, fixed version text, or active exploitation evidence, so validation should focus on version exposure and file-ingestion workflows.
Mitigation direction
- Check Bentley BE-2021-0004 and apply any vendor-recommended update or workaround.
- Block or quarantine untrusted 3DS files until affected systems are remediated.
- Restrict MicroStation file-opening workflows to trusted project sources.
- Use endpoint controls to monitor abnormal child processes from MicroStation.
- Prioritize remediation on workstations handling external design files.
Validation and detection
- Inventory Bentley MicroStation CONNECT installations and identify version 10.16.0.80.
- Map which users import or open 3DS files from external parties.
- Review security controls for email, web, and shared-drive delivery of 3DS files.
- Confirm vendor guidance from Bentley has been reviewed and tracked.
- Check whether affected workstations have compensating endpoint protections enabled.
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-2021-46586 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-22-173/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.