CVE-2025-41701 Beckhoff: Deserialization of untrusted data by TwinCAT 3 Engineering
An attacker can execute arbitrary commands by tricking a user into opening a malicious project file in TwinCAT 3 Engineering.
- 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-2025-41701?
CVE-2025-41701 is a high-severity unsafe deserialization vulnerability in Beckhoff TE1000 | TwinCAT 3 Enineering, published on 9 Sep 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 commands by opening a deliberately manipulated project file with an affected engineering tool. These arbitrary commands are executed in the user context.
Weakness: CWE-502
Which versions are affected by CVE-2025-41701?
How do I fix CVE-2025-41701?
No fix has been published for CVE-2025-41701 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-2025-41701 being exploited?
There is no known exploitation of CVE-2025-41701 in the wild and no public exploit code.
Sources
Also known as GHSA-f4rq-67qh-q636.