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Fencer Vulns
high 7.5

CVE-2024-8933 json

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

published 2024-11-13 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-49491

cvss
7.5
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 23%
public exploits
0
none known

Summary

CWE-924: Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability exists that could cause retrieval of password hash that could lead to denial of service and loss of confidentiality and integrity of controllers. To be successful, the attacker needs to inject themself inside the logical network while a valid user uploads or downloads a project file into the controller.

Vendor advisories

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

cisa ICSA-24-326-03 updated cvss 7.5

Schneider Electric Modicon M340, MC80, and Momentum Unity M1E & EcoStruxure (Update A)

  • Schneider Electric EcoStruxure™ Control Expert < 16.2HF003
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon M340 CPU Controller Modicon M340 CPU Firmware < SV3.70
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon MC80 Controller Modicon MC80 Firmware all versions
    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 16.2_HF003 Schneider Electric Modicon M340 CPU Controller Modicon M340 CPU Firmware SV3.70 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
23 mo ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.5 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 7.5 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Schneider Electric Modicon M340 CPU (part numbers BMXP34*)
  • Schneider Electric Modicon MC80 (part numbers BMKC80)
  • Schneider Electric Modicon Momentum Unity M1E Processor (171CBU*)
  • schneider-electric modicon_m340
  • schneider-electric modicon_mc80
  • schneider-electric modicon_momentum_unity_m1e_processor

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.