Description
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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Schneider Electric | Modicon M340 CPU (part numbers BMXP34*) | Versions prior to SV3.65 | — |
Advisories 2
- ICSA-24-326-04 Schneider Electric Modicon M340, MC80, and Momentum Unity M1E (Update B) CISA ICS & IT advisories · Jan 20, 2026
- SEVD-2024-317-03 Modicon Controllers M340 / Momentum / MC80 Schneider Electric CPCERT · Jan 13, 2026