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MicrostationApplication · Bentley

CVE-2021-46650

MEDIUM · 5.5 CVSS v3.1 Published 2022-02-18
Fix available
A fix is available. Upgrade to 10.16.0.80 / 10.16.02 or later.
See remediation →
58/100
Remediation priority · Elevated
No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley MicroStation CONNECT 10.16.0.80. 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 DGN 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-15536.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Out-of-bounds read vulnerability in MicroStation's DGN file parser. The parser fails to validate bounds when reading user-supplied data from DGN files, allowing an attacker to read past the end of an allocated buffer and disclose sensitive information. Requires victim to open a malicious DGN file.

MitigationApply vendor patch when available. Until then, restrict DGN file handling to trusted sources and disable automatic file preview in untrusted contexts.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
MicrostationApplication
Affected:< 10.16.02
Microstation ConnectApplication
Affected:< 10.16.0.80
ViewApplication
Affected:< 10.16.02

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed Bentley product
    Open the application and go to Help > About, or check Add/Remove Programs for Bentley MicroStation, MicroStation Connect, or Bentley View
    Affected if Any of the three affected products is installed
  2. Determine installed version number
    In the About dialog, note the full version string (for example: 10.16.01.00)
    Affected if Version cannot be determined or is not visible
  3. Compare MicroStation version to threshold
    If product is MicroStation or Bentley View, compare your version against 10.16.02 - any version below 10.16.02 is affected
    Affected if Installed version is below 10.16.02
  4. Compare MicroStation Connect version to threshold
    If product is MicroStation Connect, compare your version against 10.16.0.80 - any version below 10.16.0.80 is affected
    Affected if Installed version is below 10.16.0.80

A user is affected if they have MicroStation, MicroStation Connect, or Bentley View installed with a version number below the respective thresholds (10.16.02 or 10.16.0.80) and they open untrusted DGN files.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 10.16.0.80 / 10.16.02 or later
Fixed in 10.16.0.8010.16.02
Interim mitigation

Apply vendor patch when available. Until then, restrict DGN file handling to trusted sources and disable automatic file preview in untrusted contexts.

Recommended fix High confidence

MicroStation 10.16.02 / MicroStation Connect 10.16.0.80 / View 10.16.02

  1. Identify the installed MicroStation product (MicroStation, MicroStation Connect, or View) and current version
  2. Navigate to the Bentley product support website or official download portal
  3. Download the fixed version: MicroStation 10.16.02, MicroStation Connect 10.16.0.80, or View 10.16.02
  4. Close all running instances of the affected application
  5. Run the installer and follow the prompts to upgrade to the fixed version
  6. Restart the application after installation completes
  7. Verify the version number reflects the fixed release

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Microstation Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA3.0 h
19.0 hours of engineering $3,380
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,408.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-46650 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data