CVE-2025-26858CWE-20

CVE-2025-26858

High · published December 1, 2025

CVSS v3.1
8.6
EPSS
1%
Percentile
50.3
In the wild
Unconfirmed
What it is

⚠️ A specially crafted series of network packets can lead to a denial of service in the Socomec DIRIS Digiware M-70! 🚨 Think of it like a restaurant that serves food too quickly without checking if the kitchen can keep up—eventually, the kitchen gets overwhelmed and the service crashes. In this case, the Modbus TCP functionality is the kitchen, and those packets are the orders pouring in! If exploited, an attacker could send these packets and bring down the system, leaving your devices unable to communicate effectively. This could halt critical operations, causing significant downtime and disruption. If your devices rely on this functionality, the impact could be absolutely devastating!

Put simply

Think of it like a restaurant that serves food too quickly without checking if the kitchen can keep up—eventually, the kitchen gets overwhelmed and the service crashes. In this case, the Modbus TCP functionality is the kitchen, and those packets are the orders pouring in! This vulnerability arises from a buffer overflow in the Modbus TCP protocol implementation, which fails to properly validate the incoming packet sizes. As a result, unauthenticated attackers can craft and send specific packet sequences that trigger the overflow, leading to a denial of service condition.

What to do

If exploited, an attacker could send these packets and bring down the system, leaving your devices unable to communicate effectively. This could halt critical operations, causing significant downtime and disruption. If your devices rely on this functionality, the impact could be absolutely devastating! Immediate action is required! Upgrade the Socomec DIRIS Digiware M-70 to version 1.6.10 or later to patch this vulnerability. Additionally, consider implementing network segmentation to limit exposure to this attack vector. Regularly monitoring your network traffic could also help detect suspicious activities. You've got this! By following these steps, you’ll be one step closer to fortifying your defenses and keeping the internet safe! 🛡️

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00645 · 50.3th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2025-12-01T21:15Z
Affected products (1)
ProductVersionsFixed in
socomec/diris_m-70_firmwareall versions—
References (3)
EPSS history
Timeline
  • 01 DEC 15:25Z
    A buffer overflow vulnerability exists in the Modbus TCP functionality of Socomec DIRIS Digiware M-70 1.6.9
    cvelistv5