CVE-2025-55221 Denial of service in DIRIS Digiware M-70
An unauthenticated attacker can cause a denial of service on Socomec DIRIS Digiware M-70 devices by sending a specially crafted Modbus TCP packet.
- 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-2025-55221?
CVE-2025-55221 is a high-severity denial of service vulnerability in Socomec DIRIS Digiware M-70, published on 1 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP USB Function functionality of Socomec DIRIS Digiware M-70 1.6.9. A specially crafted network packet can lead to a denial of service. An attacker can send an unauthenticated packet to trigger this vulnerability.This vulnerability is specific to the malicious message sent via Modbus TCP over port 502.
Weakness: CWE-306
Which versions are affected by CVE-2025-55221?
It affects 1 product.
Products include Socomec Diris M-70 Firmware.
How do I fix CVE-2025-55221?
No fix has been published for CVE-2025-55221 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-2025-55221 being exploited?
There is no known exploitation of CVE-2025-55221 in the wild and no public exploit code.
Other vulnerabilities in Socomec DIRIS Digiware M-70
Sources
Also known as GHSA-cmc7-964c-85jp.