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Fencer Vulns
high 8.1

CVE-2023-6408 json

CWE-924: Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability exists that could cause a d…

published 2024-02-14 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-58645

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

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.

Patch / fix

  • schneider-electric modicon_m580_bmep585040_firmware 4.20
  • schneider-electric modicon_m340_bmxp342030h_firmware 3.60

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-331-03 updated cvss 8.1

Schneider Electric EcoStruxure Control Expert, EcoStruxure Process Expert, and Modicon M340, M580 and M580 Safety PLCs

  • Schneider Electric EcoStruxure Control Expert < 16.0
    affected: vendor fix, mitigation se.com
  • Schneider Electric EcoStruxure Process Expert < 2023
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon M340 CPU (part numbers BMXP34*) < SV3.60
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon M580 CPU (part numbers BMEP* and BMEH* excluding M580 CPU Safety) < SV4.20
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon M580 CPU Safety < SV4.21
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon MC80 (part numbers BMKC80)
    affected: mitigation se.com
  • Schneider Electric Modicon Momentum Unity M1E Processor Controller Modicon Momentum Unity M1E Processor Firmware < SV2.90
    affected: vendor fix, mitigation se.com
  • Schneider Electric EcoStruxure Control Expert 16.0 Schneider Electric EcoStruxure Process Expert 15.3_HF008 Schneider Electric Modicon M340 CPU (part numbers BMXP34*) SV3.60 Schneider Electric Modicon M580 CPU (part numbers BMEP* and BMEH*, excluding M580 CPU Safety) SV4.20 Schneider Electric Modicon M580 CPU Safety SV4.21 Schneider Electric Modicon Momentum Unity M1E Processor Controller Modicon Momentum Unity M1E Processor Firmware SV2.90
    fixed

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Schneider Electric Modicon M340 CPU (part numbers BMXP34*)
  • Schneider Electric Modicon M580 CPU (part numbers BMEP* and BMEH*, excluding M580 CPU Safety)
  • Schneider Electric Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S)
  • Schneider Electric EcoStruxure Control Expert
  • Schneider Electric EcoStruxure Process Expert
  • schneider-electric modicon_m580_bmep585040_firmware
  • schneider-electric modicon_m340_bmxp342030h_firmware
  • schneider-electric modicon_m580_bmeh586040s_firmware

Classification

Weakness
  • CWE-924 Improper Enforcement of Message Integrity During Transmission in a Communication Channel

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.