CVE-2021-34896
Description
This vulnerability allows remote attackers to execute arbitrary code 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 BMP files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14863.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Heap-based buffer overflow in Bentley View 10.15.0.75 BMP parsing allows remote code execution via malicious file.
Vulnerability
A heap-based buffer overflow exists in Bentley View version 10.15.0.75 during the parsing of BMP files. The flaw stems from insufficient validation of user-supplied data length before copying it to a heap buffer. This vulnerability is part of a broader set of out-of-bounds issues in MicroStation and MicroStation-based applications, as documented in Bentley advisory BE-2021-0002 [2]. Affected versions include Bentley View prior to 10.16.02.* [2].
Exploitation
An attacker must convince a user to open a maliciously crafted BMP file or visit a page that triggers the file parsing. No authentication is required, but user interaction is necessary. The attacker supplies a BMP file with a specially crafted data length that causes a heap-based buffer overflow when parsed by Bentley View [1].
Impact
Successful exploitation allows an attacker to execute arbitrary code in the context of the current process. This can lead to full compromise of confidentiality, integrity, and availability (CIA) of the affected system, with a CVSS v3.1 score of 7.8 [1][2].
Mitigation
Bentley has addressed this vulnerability in version 10.16.02.* and later of Bentley View [2]. Users should update to the latest version. As a general best practice, only open BMP files from trusted sources [2]. No workaround is available for unpatched versions.
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-2021-0002mitrex_refsource_MISC
- www.zerodayinitiative.com/advisories/ZDI-21-1485/mitrex_refsource_MISC
News mentions
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