CVE-2025-41676

MB connect line mbNET.mini — vulnerability CVE-2025-41676

A high privileged remote attacker can exhaust critical system resources by sending specifically crafted POST requests to the send-sms action in fast succession.

CVSS 4.9No patch available

This record: live connection— last retrieved: 7 November 2026 at 04:38.

Vendors

MB connect line, Helmholz

Products

mbNET.mini, REX 100

up to version cpe:2.3:o:mbconnectline:mbnet.mini_firmware:*:*:*:*:*:*:*:*

Published

21 July 2025

Last modified

17 June 2026

Original source information

Taken directly from NVD, CISA or the vendor — sometimes in English, unchanged from the source.

Technical description

A high privileged remote attacker can exhaust critical system resources by sending specifically crafted POST requests to the send-sms action in fast succession.

CVSS 3.1 — vector details

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack vector

NETWORK

Privileges required

HIGH

User interaction

NONE

Confidentiality

None

Integrity

None

Availability

High

EPSS — Exploit Prediction Scoring System

Probability of exploitation within 30 days

0.6%

Percentile

50e

Source: FIRST.org, updated on 6 November 2026.

Patch information

As this is an authenticated exploit, you can mitigate it by making sure that no malicious actor can login to a vulnerable device.

IACS Radar assessment

Our own interpretation and context for the source data above.

IACS Radar assessment

Our own interpretation and context for this vulnerability — not an official source.

IACS Radar priority score

31/ 100

Based on CVSS 4.9, EPSS 0.6%, industrial relevance 40/100.

Combines CVSS, EPSS, KEV status, industrial relevance and exposure relevance — a complement to, not a replacement for, the individual scores below and above.

Conditions for exploitation

•Network access to the affected device or segment is required.
•Limited user privileges are required.
•No user interaction required.

Operational impact & energy relevance

Possible loss of visibility of or control over the process upon successful exploitation.

No strong energy-sector-specific signals recognised; general OT/ICS relevance.

Recommended defensive measures

•Test failover and recovery procedures in case the system fails.
•Restrict network access to the affected device to a dedicated OT management segment.
•Implement network segmentation in line with zones and conduits (IEC 62443-3-2).
•Monitor for abnormal protocol traffic using an OT-aware detection system.

Industrial relevance score

40/ 100

• Mentioned in an official CISA ICS advisory, which confirms direct relevance to industrial control systems.

Classification is provisional; manual verification by an OT security analyst is recommended.

Classified by IACS Radar-analysepijplijn (geautomatiseerd) on 7 November 2026.

IEC 62443 mapping

IEC 62443-3-3FR7 · Beschikbaarheid van middelen

Automatic IACS Radar assessment based on the reported CWE weakness classification; not an official certification statement.

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