CVE-2024-38435Network attack vector

Authenticated controller service interruption

Published Jul 21, 2024 · Updated Aug 2, 2024

Improper exception handling in Unitronics Vision PLC before 9.9.1 allows remote authenticated users to interrupt controller service. The public CNA record identifies improper handling of an exceptional condition but does not disclose the affected component, triggering input, or failed operation. Low-privileged network access is required, and the published consequence is limited to loss of controller availability.

CVSS severity6.5
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper exception handling in Unitronics Vision PLC before 9.9.1 allows remote authenticated users to interrupt controller service. The public CNA record identifies improper handling of an exceptional condition but does not disclose the affected component, triggering input, or failed operation. Low-privileged network access is required, and the published consequence is limited to loss of controller availability.

The record

CVE
CVE-2024-38435
Published
Jul 21, 2024
Updated
Aug 2, 2024
Vendor
Unitronics
Product
Vision PLC
Classifications
CWE-703, T0814
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=All versions <Upgrade to v9.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Unitronics · Vision PLCversion=All versions <Upgrade to v9.9.1

Published CVSS scores

6.5Israel National Cyber DirectorateCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-703Improper Check or Handling of Exceptional Conditions
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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