CVE-2025-55222Network attack vector

Remote hang via unauthenticated Modbus register write

Published Dec 1, 2025 · Updated Dec 1, 2025

Denial of service in Socomec DIRIS Digiware M-70 1.6.9 allows remote attackers to hang the gateway via Modbus RTU over TCP on port 503. The service accepts an unauthenticated Write Single Register request for register 57872 and treats second-data-byte values of 1 or 4 as control actions that stop protocol responses. Network access to port 503 is sufficient, and recovery requires a manual power cycle.

CVSS severity8.6
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Socomec DIRIS Digiware M-70 1.6.9 allows remote attackers to hang the gateway via Modbus RTU over TCP on port 503. The service accepts an unauthenticated Write Single Register request for register 57872 and treats second-data-byte values of 1 or 4 as control actions that stop protocol responses. Network access to port 503 is sufficient, and recovery requires a manual power cycle.

The record

CVE
CVE-2025-55222
Published
Dec 1, 2025
Updated
Dec 1, 2025
Vendor
Socomec
Product
DIRIS Digiware M-70
Classifications
CWE-306, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Socomec · DIRIS Digiware M-70version=1.6.9

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.6Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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