CVE-2021-34933

Code execution via unchecked JT object use

Published Jan 13, 2022 · Updated Aug 4, 2024

Use-after-free in Bentley View 10.15.0.75 allows remote attackers to execute code after a user opens a malicious JT file. During JT parsing, the application performs operations on an object without first validating that the object still exists, causing reuse of freed memory. Exploitation requires user interaction and runs attacker-controlled code with the privileges of the current Bentley View process.

CVSS severity7.8
High
EPSS probability1.94%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Bentley View 10.15.0.75 allows remote attackers to execute code after a user opens a malicious JT file. During JT parsing, the application performs operations on an object without first validating that the object still exists, causing reuse of freed memory. Exploitation requires user interaction and runs attacker-controlled code with the privileges of the current Bentley View process.

The record

CVE
CVE-2021-34933
Published
Jan 13, 2022
Updated
Aug 4, 2024
Vendor
Bentley Systems
Product
Bentley View
Classifications
CWE-416, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 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=10.15.0.75

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Bentley Systems · Bentley Viewversion=10.15.0.75

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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-416Use After Free
T1203Exploitation for Client Execution

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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