CVE-2025-41700 CODESYS Development System - Deserialization of Untrusted Data
An attacker can execute arbitrary code by tricking a user into opening a malicious project file in the CODESYS Development System.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-41700?
CVE-2025-41700 is a high-severity unsafe deserialization vulnerability in CODESYS Development System, published on 1 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2025-41700?
It affects 1 product.
Products include Codesys Codesys.
How do I fix CVE-2025-41700?
No fix has been published for CVE-2025-41700 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-41700 being exploited?
There is no known exploitation of CVE-2025-41700 in the wild and no public exploit code.
Other vulnerabilities in CODESYS Development System
Sources
Also known as GHSA-cx2q-9f4q-7mgw.