CVE-2025-41658: CODESYS Toolkit Exposes Sensitive Files via Default Permissions

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-04 · updated 2026-06-17
Weakness: CWE-276

Description

CODESYS Runtime Toolkit-based products may expose sensitive files to local low-privileged operating system users due to default file permissions.

Affected products

CODESYS Control for BeagleBone SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for emPC-A/iMX6 SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for IOT2000 SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for Linux ARM SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for Linux SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for PFC100 SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for PFC200 SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for PLCnext SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for Raspberry Pi SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Control for WAGO Touch Panels 600 SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0
CODESYS Runtime Toolkit: from 0.0.0.0 before 3.5.21.20 — fixed in 3.5.21.20
CODESYS Virtual Control SL: from 0.0.0.0 before 4.16.0.0 — fixed in 4.16.0.0

How to fix

Upgrade to a fixed version: CODESYS Control for BeagleBone SL 4.16.0.0; CODESYS Control for emPC-A/iMX6 SL 4.16.0.0; CODESYS Control for IOT2000 SL 4.16.0.0; CODESYS Control for Linux ARM SL 4.16.0.0; CODESYS Control for Linux SL 4.16.0.0; CODESYS Control for PFC100 SL 4.16.0.0; CODESYS Control for PFC200 SL 4.16.0.0; CODESYS Control for PLCnext SL 4.16.0.0; CODESYS Control for Raspberry Pi SL 4.16.0.0; CODESYS Control for WAGO Touch Panels 600 SL 4.16.0.0; CODESYS Runtime Toolkit 3.5.21.20; CODESYS Virtual Control SL 4.16.0.0. Check the vendor advisory for mitigations.

References

https://certvde.com/de/advisories/VDE-2025-049

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