CVE-2025-41691 CODESYS Control DoS via Unauthenticated NULL Pointer Dereference
Unauthenticated remote attackers can cause denial of service in CODESYS Control runtime systems via crafted requests triggering a null pointer dereference.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-41691?
CVE-2025-41691 is a high-severity vulnerability in CODESYS Control RTE (SL), published on 4 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, potentially leading to a denial-of-service (DoS) condition.
Weakness: CWE-476
Which versions are affected by CVE-2025-41691?
How do I fix CVE-2025-41691?
No fix has been published for CVE-2025-41691 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-41691 being exploited?
There is no known exploitation of CVE-2025-41691 in the wild and no public exploit code.
Sources
Also known as GHSA-wxg9-7gqq-wxgf.