CVE-2025-13901 Denial of service in Modicon M241/M251
Unauthenticated attackers can cause partial denial of service on Schneider Electric Modicon PLCs by sending malicious payloads to occupy communication channels.
- 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-2025-13901?
CVE-2025-13901 is a medium-severity denial of service vulnerability in Schneider Electric Modicon M241/M251, published on 10 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CWE-404 Improper Resource Shutdown or Release vulnerability exists that could cause partial Denial of Service on Machine Expert protocol when an unauthenticated attacker sends malicious payload to occupy active communication channels.
Weakness: CWE-404
Which versions are affected by CVE-2025-13901?
It affects 3 products.
Products include Schneider-Electric Modicon M241 Firmware, Schneider-Electric Modicon M251 Firmware, Schneider-Electric Modicon M262 Firmware.
How do I fix CVE-2025-13901?
No fix has been published for CVE-2025-13901 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-2025-13901 being exploited?
There is no known exploitation of CVE-2025-13901 in the wild and no public exploit code.
Other vulnerabilities in Schneider Electric Modicon M241/M251
Sources
Also known as GHSA-qc8m-h3rg-94h4.