CVE-2024-8936
published 2024-11-13CVE-2024-8936: CWE-20: Improper Input Validation vulnerability exists that could lead to loss of confidentiality of controller memory after a successful Man-In-The-Middle…
PriorityP336medium6.5CVSS 3.1
AVNACHPRNUINSUCHILAN
EPSS
0.49%
38.8th percentile
CWE-20: Improper Input Validation vulnerability exists that could lead to loss of confidentiality of controller memory
after a successful Man-In-The-Middle attack followed by sending a crafted Modbus function call used to tamper
with memory.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| schneider_electric | modicon_m340_cpu | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
nvdv4.08.3HIGHCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/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
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GHSA
GHSA-rrmf-46w6-f74r: CWE-20: Improper Input Validation vulnerability exists that could lead to loss of confidentiality of controller memory
after a successful Man-In-The-M
ghsa_unreviewed·2024-11-13
CVE-2024-8936 [HIGH] CWE-20 GHSA-rrmf-46w6-f74r: CWE-20: Improper Input Validation vulnerability exists that could lead to loss of confidentiality of controller memory
after a successful Man-In-The-M
CWE-20: Improper Input Validation vulnerability exists that could lead to loss of confidentiality of controller memory
after a successful Man-In-The-Middle attack followed by sending a crafted Modbus function call used to tamper
with memory.
CISA ICS
Schneider Electric Modicon M340, MC80, and Momentum Unity M1E (Update B)
cisa_ics·2026-01-20·CVSS 8.3
[HIGH] Schneider Electric Modicon M340, MC80, and Momentum Unity M1E (Update B)
ICS Advisory
##
Schneider Electric Modicon M340, MC80, and Momentum Unity M1E (Update B)
Last RevisedJanuary 20, 2026
Alert CodeICSA-24-326-04
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
View CSAF
## Summary
Schneider Electric is aware of multiple vulnerabilities in its Modicon Controllers M340 / Momentum / MC80 products.Modicon PAC control and monitor industrial operations.Failure to apply the provided remediations/mitigations below may risk unauthorized access to the controller, which could result in the possibility of denial of service and loss of confidentiality, integrity of the controller.January 2026 Update: Remediation is now available for Modicon MC80.
The following versions of Schneider Electric Modicon M34
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2024-11-13
Published