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CVE-2023-6408

HIGH
8.1
CVSS Score
Published: February 14, 2024 at 04:52 PM UTC
Updated: June 17, 2026 at 06:50 AM UTC
92 products affected across 1 vendorModicon M340 BMXP342020 FirmwareModicon M340 BMXP3420302 FirmwareModicon M340 BMXP341000 Firmware

Using Modicon M340 CPU (part numbers BMXP34*) by Schneider Electric?

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Severity
HIGH8.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

CWE-924: Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability exists that could cause a denial of service and loss of confidentiality, integrity of controllers when conducting a Man in the Middle attack.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

EcoStruxure Control Expert· Schneider Electric
95%
v < 16.0
Affected range stops below 16.0, so it looks safe — our inference, not a vendor statement
EcoStruxure Process Expert· Schneider Electric
95%
v < 2023
Affected range stops below 2023, so it looks safe — our inference, not a vendor statement
Modicon M340 BMXP341000 Firmware· Schneider Electric
95%
v < 3.60
Affected range stops below 3.60, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp341000 (same device)
Modicon M340 BMXP341000H Firmware· Schneider Electric
95%
v < 3.60
Affected range stops below 3.60, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp341000h (same device)
Modicon M340 BMXP342000 Firmware· Schneider Electric
95%
v < 3.60
Affected range stops below 3.60, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp342000 (same device)
Modicon M340 BMXP342010 Firmware· Schneider Electric
95%
v < 3.60
Affected range stops below 3.60, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp342010 (same device)
Modicon M340 BMXP3420102 Firmware· Schneider Electric
95%
v < 3.60
Affected range stops below 3.60, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp3420102 (same device)
Modicon M340 Bmxp3420102cl Firmware· Schneider Electric
95%
v < 3.60
Affected range stops below 3.60, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp3420102cl (same device)
Modicon M340 BMXP342020 Firmware· Schneider Electric
95%
v < 3.60
Affected range stops below 3.60, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp342020 (same device)
Modicon M340 BMXP342020H Firmware· Schneider Electric
95%
v < 3.60
Affected range stops below 3.60, so it looks safe — our inference, not a vendor statement
schneider-electric-modicon-m340-bmxp342020h (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-044-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2024-044-01.pdf

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHschneider
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-924

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