Security readout for executives and security teams
Plain-English summary
CVE-2021-46571 is a high-severity code execution flaw in Bentley View 10.16.0.80. A user must open a malicious JT file or visit a malicious page. If successful, attacker-controlled code runs with the user’s application privileges, risking sensitive design data, workstation integrity, and business disruption.
Executive priority
Prioritize remediation for engineering, design, and project teams exchanging JT files externally. The risk is user-triggered but high impact if compromised.
Technical view
The flaw is in JT file parsing and is associated with CWE-416. The parser may operate on an object without validating its existence, enabling arbitrary code execution in the current process. CVSS 3.0 is 7.8 with local attack vector and required user interaction.
Likely exposure
Exposure is most likely on workstations running Bentley View 10.16.0.80, especially where users handle external JT CAD/model files or receive project files from third parties.
Exploitation context
The sources describe user-assisted exploitation through a malicious file or page. The provided bundle does not show CISA KEV listing or confirmed active exploitation.
Researcher notes
ZDI tracks this as ZDI-22-158 and references ZDI-CAN-15365. Evidence supports affected version 10.16.0.80 only. Do not broaden scope without vendor confirmation.
Mitigation direction
- Inventory Bentley View installations and identify version 10.16.0.80.
- Review Bentley advisory BE-2021-0005 for vendor-approved updates or mitigations.
- Restrict opening JT files from untrusted external sources.
- Handle external model files in isolated workstations or sandboxed review environments.
- Use endpoint controls to detect abnormal Bentley View child processes or crashes.
Validation and detection
- Confirm installed Bentley View versions against asset inventory.
- Check whether Bentley BE-2021-0005 guidance has been applied.
- Review recent JT file handling from email, browser downloads, and file shares.
- Verify users handling external design files have compensating isolation controls.
- Look for unusual crashes or endpoint alerts involving Bentley View.
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-2021-46571 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-22-158/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.