CVE-2022-32140Network attack vector

Authenticated service interruption via malformed data length

Published Jun 24, 2022 · Updated Sep 16, 2024

Improper length handling in CODESYS Runtime Toolkit and PLCWinNT before 2.4.7.57 allows remote authenticated users to interrupt service. The communication server accepts an inconsistent length for structured request data, causing an internal buffer over-read. Exploitation requires a successful controller login unless no level 1 online password is configured, and the reported consequence is denial of service only.

CVSS severity6.5
Medium
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper length handling in CODESYS Runtime Toolkit and PLCWinNT before 2.4.7.57 allows remote authenticated users to interrupt service. The communication server accepts an inconsistent length for structured request data, causing an internal buffer over-read. Exploitation requires a successful controller login unless no level 1 online password is configured, and the reported consequence is denial of service only.

The record

CVE
CVE-2022-32140
Published
Jun 24, 2022
Updated
Sep 16, 2024
Vendor
CODESYS GmbH
Product
CODESYS Runtime Toolkit
Classifications
CWE-120, CWE-130, T0814
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=V2 <V2.4.7.57

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CODESYS GmbH · CODESYS Runtime Toolkitversion=V2 <V2.4.7.57
CODESYS GmbH · CODESYS Runtime PLCWinNTversion=V2 <V2.4.7.57

Published CVSS scores

6.5CERT VDECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0NVDAV:N/AC:L/Au:S/C:N/I:N/A:P

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input
CWE-130Improper Handling of Length Parameter Inconsistency
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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