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CVE-2025-41700

High

Description

An unauthenticated attacker can trick a local user into executing arbitrary code by opening a deliberately manipulated CODESYS project file with a CODESYS development system. This arbitrary code is executed in the user context.

SeverityHigh
CVSS7.8
Exploit probability—
ProductCodesys
PublishedDec 1, 2025
First seenDec 1, 2025
Weakness typeCWE-502Deserialization of untrusted data

How to fix

Update
  • codesys codesys3.5.21.40 or later

Affected products

ProductAffected versionsFixed in
codesys codesysv < 3.5.21.403.5.21.40

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