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Fencer Vulns
critical 9.8

CVE-2024-11737 json

CWE-20: Improper Input Validation vulnerability exists that could lead to a denial of service and a loss of confidentiality, integrity of t…

published 2024-12-11 22 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-34178

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

CWE-20: Improper Input Validation vulnerability exists that could lead to a denial of service and a loss of confidentiality, integrity of the controller when an unauthenticated crafted Modbus packet is sent to the device.

Vendor advisories

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

cisa ICSA-24-352-04 updated cvss 9.8

Schneider Electric Modicon

  • Schneider Electric Modicon Controllers LMC058 <5.0.4.19
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon Controllers M241 <5.2.11.29 Schneider Electric Modicon Controllers M251 <5.2.11.29
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon Controllers M258 <5.0.4.19
    affected: vendor fix, mitigation se.com
  • Schneider Electric Modicon Controllers LMC058 Modicon Controllers LMC058 5.0.4.19 Schneider Electric Modicon Controllers M241 Modicon Controllers M241 5.2.11.29 Schneider Electric Modicon Controllers M251 Modicon Controllers M251 5.2.11.29 Schneider Electric Modicon Controllers M258 Modicon Controllers M258 5.0.4.19
    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
yes
Technical impact
total
Assessed
22 mo ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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 Controllers M241 / M251
  • Schneider Electric Modicon Controllers M258 / LMC058

Classification

Weakness
  • CWE-20 Improper Input Validation

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.