CVE-2022-32137: CODESYS Runtime System prone to heap based buffer overflow

Severity: medium (CVSS 6.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% 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-122

Description

In multiple CODESYS products, a low privileged remote attacker may craft a request, which may cause a heap-based buffer overflow, resulting in a denial-of-service condition or memory overwrite. 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

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17139&token=ec67d15a433b61c77154166c20c78036540cacb0&download=
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17139&token=ec67d15a433b61c77154166c20c78036540cacb0&download=

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