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CVE-2021-34871

25
FAUCET Score

CVE-2021-34871 is a heap-based buffer overflow vulnerability in Bentley View and MicroStation, specifically within the BMP file parsing component. An attacker can exploit this by tricking a user into opening a malicious BMP file or visiting a malicious page, leading to arbitrary code execution in the context of the current process. This vulnerability has a high CVSS score of 7.8 due to its potential for complete compromise of confidentiality, integrity, and availability, though user interaction is required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.16.02CPE matchmatch criteria
cpe:2.3:a:bentley:bentley_view:*:*:*:*:*:*:*:*
< 10.16.02CPE matchmatch criteria
cpe:2.3:a:bentley:microstation:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.00%
Probability of exploitation in next 30 days
EPSS Percentile
78.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0200 is in the 78th percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bentley.com / en/common-vulnerability-exposure/BE-2021-0002
Vendor Advisory
zerodayinitiative.com / advisories/ZDI-21-1459
Third Party AdvisoryVDB Entry