Security readout for executives and security teams
Plain-English summary
CVE-2021-46655 is a high-severity code execution flaw in Bentley View 10.15.0.75. A victim must open a malicious JT file or visit a malicious page. If successful, attacker code runs with the user’s application privileges, making exposed engineering workstations the main concern.
Executive priority
Treat this as a targeted workstation risk, not an internet-facing emergency. Prioritize engineering, design, and project teams that exchange JT files externally, then confirm vendor remediation status.
Technical view
The flaw is in Bentley View JT file parsing. The source describes missing validation that an object exists before operations are performed on it, mapped to CWE-416. ZDI tracked it as ZDI-CAN-15630 / ZDI-22-242. CVSS 3.0 is 7.8 with user interaction required.
Likely exposure
Likely exposure is limited to endpoints running Bentley View 10.15.0.75, especially systems that receive or open JT model files from external parties.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires user interaction through a malicious file or page, so phishing, supplier file exchange, or project collaboration channels are plausible delivery paths.
Researcher notes
Evidence is sufficient for affected product, version, weakness class, impact, and user-interaction requirement. The provided bundle does not include detailed patch text, exploitation-in-the-wild confirmation, or broader affected-version claims.
Mitigation direction
- Inventory and prioritize systems running Bentley View 10.15.0.75.
- Review Bentley BE-2021-0005 for fixed builds or official workarounds.
- Update, replace, or remove affected Bentley View installations per vendor guidance.
- Restrict opening JT files from untrusted sources until remediation is confirmed.
- Use endpoint protections and least-privilege user accounts on engineering workstations.
Validation and detection
- Confirm installed Bentley View versions across managed endpoints.
- Check whether JT files are associated with Bentley View 10.15.0.75.
- Verify remediation status against Bentley BE-2021-0005.
- Review mail, web, and endpoint alerts for suspicious JT file handling.
- Validate controls without using malicious proof-of-concept files.
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-2021-46655 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-22-242/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.