CVE-2021-46630
Description
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley View 10.15.0.75. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of FBX files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-15460.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
An out-of-bounds read in Bentley View's FBX parsing allows remote attackers to disclose sensitive information, potentially leading to code execution.
Vulnerability
The vulnerability exists in the parsing of FBX files within Bentley View version 10.15.0.75 and earlier versions prior to 10.16.02.*. The specific flaw is an out-of-bounds read caused by insufficient validation of user-supplied data. When a malformed FBX file is opened, the application reads beyond the allocated buffer boundary, potentially disclosing sensitive memory contents. [1][2]
Exploitation
An attacker must convince a user to open a maliciously crafted FBX file or visit a page that triggers the file load. No authentication is required, but user interaction is necessary. The attacker crafts an FBX file with specially crafted data that triggers the out-of-bounds read when parsed by Bentley View. [1]
Impact
Successful exploitation results in the disclosure of sensitive information from the process memory. While the direct impact is limited to information disclosure (CVSS 3.3, low confidentiality), the ZDI advisory notes that an attacker can leverage this vulnerability in conjunction with other vulnerabilities to achieve arbitrary code execution in the context of the current process. [1][2]
Mitigation
Bentley has addressed this vulnerability in version 10.16.02.* and later releases of Bentley View and MicroStation-based applications. Users should update to the latest version. As a general best practice, only open FBX files from trusted sources. No workaround is available for unpatched versions. [2]
AI Insight generated on May 27, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Range: = 10.15.0.75
- Bentley/Viewv5Range: 10.15.0.75
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- www.bentley.com/en/common-vulnerability-exposure/BE-2021-0012mitrex_refsource_MISC
- www.zerodayinitiative.com/advisories/ZDI-22-217/mitrex_refsource_MISC
News mentions
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