CVE-2023-6409

Schneider Electric Modicon Momentum Unity M1E Processor Controller — vulnerability CVE-2023-6409

CWE-798: Use of Hard-coded Credentials vulnerability exists that could cause unauthorized access to a project file protected with application password when opening the file with EcoStruxure Control Expert.

CVSS 7.7Patch available

This record: live connection— last retrieved: 7 November 2026 at 15:53.

Vendor

Schneider Electric

Products

Modicon Momentum Unity M1E Processor Controller, Modicon MC80

up to version vers:intdot/<16.0

Published

14 February 2024

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

CVSS 3.1 — vector details

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

Attack vector

LOCAL

Privileges required

NONE

User interaction

NONE

Confidentiality

High

Integrity

High

Availability

None

EPSS — Exploit Prediction Scoring System

Probability of exploitation within 30 days

0.2%

Percentile

14e

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

Patch information

SV3.60 of Modicon M340 firmware includes a fix for this vulnerability and is available for download here: https://www.se.com/ww/en/product-range/1468- modicon-m340

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

46/ 100

Based on CVSS 7.7, EPSS 0.2%, industrial relevance 55/100.

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

•Local or adjacent access to the device is required.
•No valid credentials are needed.
•No user interaction required.

Operational impact & energy relevance

Limited impact on availability; the risk lies mainly with confidentiality or integrity of process data.

Assessed as relevant to the energy sector based on: Vermeld in een officiële CISA ICS Advisory, wat directe relevantie voor industriële besturingssystemen bevestigt. Vendor "Schneider Electric" is a known supplier of equipment for the energy sector.

Recommended defensive measures

•Change default or hardcoded credentials and restrict access to the management interface.
•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

55/ 100

• Mentioned in an official CISA ICS advisory, which confirms direct relevance to industrial control systems.
• Vendor "Schneider Electric" is a known supplier of equipment for the energy sector.

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 62443-4-2FR1 · Identificatie- en authenticatiebeheer

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

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