CVE-2025-26858Network attack vector

Unauthenticated gateway reboot via Modbus length miscalculation

Published Dec 1, 2025 · Updated Dec 1, 2025

Buffer overflow in Socomec DIRIS Digiware M-70 1.6.9 allows remote attackers to reboot the gateway via unauthenticated Modbus TCP packets. modbusServerProcessData adds six to a checked header length and passes the enlarged value to Mem_Copy, overrunning a 256-byte destination and corrupting adjacent linked-list pointers. Three crafted packets in one TCP session reach the corrupted pointer, causing the device to crash and reboot.

CVSS severity8.6
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer overflow in Socomec DIRIS Digiware M-70 1.6.9 allows remote attackers to reboot the gateway via unauthenticated Modbus TCP packets. modbusServerProcessData adds six to a checked header length and passes the enlarged value to Mem_Copy, overrunning a 256-byte destination and corrupting adjacent linked-list pointers. Three crafted packets in one TCP session reach the corrupted pointer, causing the device to crash and reboot.

The record

CVE
CVE-2025-26858
Published
Dec 1, 2025
Updated
Dec 1, 2025
Vendor
Socomec
Product
DIRIS Digiware M-70
Classifications
CWE-20, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

8.6Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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-20Improper Input Validation
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo