CVE-2025-3112 Denial of service in Modicon Controllers M241/M251
An authenticated attacker can cause a denial of service on Schneider Electric Modicon controllers by sending manipulated HTTPS headers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-3112?
CVE-2025-3112 is a high-severity denial of service vulnerability in Schneider Electric Modicon Controllers M241/M251, published on 10 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
CWE-400: Uncontrolled Resource Consumption vulnerability exists that could cause Denial of Service when an authenticated malicious user sends manipulated HTTPS Content-Length header to the webserver.
Weakness: CWE-400
Which versions are affected by CVE-2025-3112?
How do I fix CVE-2025-3112?
No fix has been published for CVE-2025-3112 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-3112 being exploited?
There is no known exploitation of CVE-2025-3112 in the wild and no public exploit code.
Sources
Also known as GHSA-ww37-xgr7-c25p.