CVE-2022-31806: Insecure default settings in CODESYS Runtime Toolkit 32 bit full and CODESYS PLCWinNT

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% 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-1188

Description

In CODESYS V2 PLCWinNT and Runtime Toolkit 32 in versions prior to V2.4.7.57 password protection is not enabled by default and there is no information or prompt to enable password protection at login in case no password is set at the controller.

Affected products

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