CVE-2023-6408Network attack vector

Controller compromise through unverified channel messages

Published Feb 14, 2024 · Updated Aug 2, 2024

Improper message-integrity enforcement in Schneider Electric EcoStruxure software and Modicon PLCs allows remote attackers to compromise controllers. Schneider Electric has not published the specific communication channel, message type, or integrity check that fails to reject manipulated traffic. A network-positioned man-in-the-middle attacker can interfere with controller communications without credentials, causing data disclosure, unauthorized changes, or a service interruption.

CVSS severity8.1
High
EPSS probability0.32%
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

Improper message-integrity enforcement in Schneider Electric EcoStruxure software and Modicon PLCs allows remote attackers to compromise controllers. Schneider Electric has not published the specific communication channel, message type, or integrity check that fails to reject manipulated traffic. A network-positioned man-in-the-middle attacker can interfere with controller communications without credentials, causing data disclosure, unauthorized changes, or a service interruption.

The record

CVE
CVE-2023-6408
Published
Feb 14, 2024
Updated
Aug 2, 2024
Vendor
Distributed Data Systems
Product
EcoStruxure Control Expert
Classifications
CWE-924, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=Versions prior to v16.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Distributed Data Systems · EcoStruxure Control Expertversion=Versions prior to v16.0
Distributed Data Systems · Modicon M580 Safety CPUversion=0 <*; version=All Versions
Distributed Data Systems · Modicon M580 CPUversion=0 <4.20; version=Versions prior to sv4.20
Distributed Data Systems · Modicon M340 Processorsversion=0 <3.60; version=Versions prior to sv3.60
Distributed Data Systems · EcoStruxure Process Expertversion=Versions prior to v2023

Published CVSS scores

8.1Schneider Electric SECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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-924Improper Enforcement of Message Integrity During Transmission in a Communication Channel
T1557Adversary-in-the-Middle

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