Improper input validation in Schneider Electric Modicon M340 CPU
Priority LOW 37CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00499 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Schneider Electric | Modicon M340 CPU (part numbers BMXP34*) | Versions prior to SV3.65 | — | No fix listed | CNA |
- Modicon M340 CPU (part numbers BMXP34*) VendorSchneider Electric Affected Versions prior to SV3.65 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-8936
- 2026-10-03 Alias added: GHSA-rrmf-46w6-f74r
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- TI-2022-15561 OS command injection in Schneider Electric SpaceLogic C-Bus Home Controller CVSS 3.1HIGH 8.8
- TI-2023-04970 Path traversal in Schneider Electric C-Bus Toolkit CVSS 3.1CRITICAL 9.8
- TI-2019-04862 Improper handling of exceptional conditions in Schneider Electric Modicon M580 CVSS 3.1HIGH 7.5
- TI-2018-05690 Improper handling of exceptional conditions in Modicon M580 Modicon M340 Modicon Quantum… CVSS 3.1HIGH 7.5
Sources
- CVE-2024-8936 · CVE Program
- CVE-2024-8936 · NVD
- FIRST EPSS
- GHSA-rrmf-46w6-f74r · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences