CVE-2022-32141: CODESYS runtime system prone to denial of service due to buffer over read

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-06-24 · updated 2026-06-17
Weakness: CWE-126

Description

Multiple CODESYS Products are prone to a buffer over read. A low privileged remote attacker may craft a request with an invalid offset, which can cause an internal buffer over-read, resulting in a denial-of-service condition. User interaction is not required.

Affected products

CODESYS PLCWinNT: from 2.0 before 2.4.7.57 — fixed in 2.4.7.57
CODESYS Runtime Toolkit: from 2.0 before 2.4.7.57 — fixed in 2.4.7.57

How to fix

Upgrade to a fixed version: CODESYS PLCWinNT 2.4.7.57; CODESYS Runtime Toolkit 2.4.7.57. Check the vendor advisory for mitigations.

References

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