Security readout for executives and security teams
Plain-English summary
Bentley MicroStation CONNECT 10.16.0.80 can read beyond a memory buffer while parsing 3DS files. A victim must open a malicious file or visit a malicious page. The disclosed impact is limited information exposure, but sources note it could support code execution when chained with other flaws.
Executive priority
Treat this as a targeted low-severity workstation risk. It does not justify emergency response unless the vulnerable version is widely deployed or users routinely handle untrusted design files.
Technical view
CVE-2021-46595 is a CWE-125 out-of-bounds read in 3DS file parsing in Bentley MicroStation CONNECT 10.16.0.80. CVSS 3.0 is 3.3, local vector, no privileges, user interaction required, confidentiality low, no integrity or availability impact.
Likely exposure
Exposure is limited to environments running Bentley MicroStation CONNECT 10.16.0.80, especially users who open externally supplied 3DS files or browse pages that may deliver malicious content.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires user interaction. The strongest concern is chaining with other vulnerabilities to run code in the current process.
Researcher notes
ZDI tracks this as ZDI-22-182 and ZDI-CAN-15389. The reported primitive is out-of-bounds read during 3DS parsing. Avoid assuming standalone code execution; the source says code execution requires chaining with other vulnerabilities.
Mitigation direction
- Check Bentley advisory BE-2021-0004 for vendor remediation guidance.
- Identify and prioritize any MicroStation CONNECT 10.16.0.80 installations.
- Restrict opening untrusted 3DS files from email, web, or third parties.
- Apply vendor-approved updates or workarounds when confirmed by Bentley.
- Use endpoint and mail controls to reduce malicious file delivery.
Validation and detection
- Inventory installed Bentley MicroStation CONNECT versions.
- Confirm whether version 10.16.0.80 is present.
- Review file-handling workflows involving 3DS files.
- Check whether users receive 3DS files from external sources.
- Verify remediation status against Bentley’s advisory.
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
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ATT&CK lookup starting points
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CWE-125: Exact CWE lookup
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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-2021-46595 mapping review
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Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
3.3LowVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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-22-182/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.