# CVE-2025-55221: A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP USB Function functionality of…

Source: https://junglewise.ai/threats/cve-2025-55221-a-denial-of-service-vulnerability-exists-in-the-modbus-tcp-and  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-01  
License: CC BY 4.0 with a link back

CVE-2025-55221 · Severity: high · CVSS 8.6 · Published 2025-12-01

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.

Technologies: [Socomec Diris M-70](https://junglewise.ai/threats/technologies/diris-m-70), [Socomec Diris M-70 Firmware](https://junglewise.ai/threats/technologies/diris-m-70-firmware). Vendors: [Socomec](https://junglewise.ai/threats/vendors/socomec).

## Quick answers

**Is CVE-2025-55221 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-55221 being exploited in the wild.

**How severe is CVE-2025-55221?** High severity, with a CVSS score of 8.6, published 1 December 2025.

**Which products and versions are affected?** Socomec Diris M-70, Socomec Diris M-70 Firmware. The advisory does not name versions.

**Is there a fix for CVE-2025-55221?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-55221?** Check whether you run Socomec Diris M-70 or Socomec Diris M-70 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Socomec Diris M-70
- Socomec Diris M-70 Firmware

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