CVE-2021-46616

Information disclosure via BMP parser over-read

Published Feb 18, 2022 · Updated Aug 4, 2024

Out-of-bounds read in Bentley Systems MicroStation CONNECT 10.16.0.80 allows remote attackers to disclose process memory via a BMP file. The BMP parser fails to validate attacker-controlled image data before reading past the end of an allocated buffer. Exploitation requires the target to open a malicious file or visit a malicious page; code execution also requires another vulnerability.

CVSS severity5.5
Medium
EPSS probability1.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Bentley Systems MicroStation CONNECT 10.16.0.80 allows remote attackers to disclose process memory via a BMP file. The BMP parser fails to validate attacker-controlled image data before reading past the end of an allocated buffer. Exploitation requires the target to open a malicious file or visit a malicious page; code execution also requires another vulnerability.

The record

CVE
CVE-2021-46616
Published
Feb 18, 2022
Updated
Aug 4, 2024
Vendor
Bentley Systems
Product
MicroStation
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.16.0.80

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Bentley Systems · MicroStationversion=10.16.0.80

Published CVSS scores

5.5NISTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3NISTAV:N/AC:M/Au:N/C:P/I:N/A:N
3.3Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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