Memory corruption in Schneider Electric Modicon M340 CPU
Priority MEDIUM 42CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability exists that could cause a potential arbitrary code execution after a successful Man-In-The-Middle attack followed by sending a crafted Modbus function call to tamper with memory area involved in memory size computation.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00532 45th 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
- Total
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 |
| Schneider Electric | Modicon MC80 (part numbers BMKC80) | All versions | — | No fix listed | CNA |
| Schneider Electric | Modicon Momentum Unity M1E Processor (171CBU*) | All Versions | — | No fix listed | CNA |
- Modicon M340 CPU (part numbers BMXP34*) VendorSchneider Electric Affected Versions prior to SV3.65 Fixed in — No fix listed CNA
- Modicon MC80 (part numbers BMKC80) VendorSchneider Electric Affected All versions Fixed in — No fix listed CNA
- Modicon Momentum Unity M1E Processor (171CBU*) VendorSchneider Electric Affected All Versions Fixed in — No fix listed CNA
CPE names CISA-ADP · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:* | not specified by CISA-ADP | — | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_mc80:-:*:*:*:*:*:*:* | not specified by CISA-ADP | — | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_momentum_unity_m1e_processor:-:*:*:*:*:*:*:* | not specified by CISA-ADP | — | Schneider Electric |
- cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:* Versions not specified by CISA-ADP — ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_mc80:-:*:*:*:*:*:*:* Versions not specified by CISA-ADP — ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_momentum_unity_m1e_processor:-:*:*:*:*:*:*:* Versions not specified by CISA-ADP — ·Schneider Electric
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-8938
- 2026-10-03 Alias added: GHSA-fv43-v7vc-rjjf
More Schneider Electric vulnerabilities
- TI-2018-05679 SQL injection in U.motion Builder software version 1.3.4 KEVCVSS 3.1CRITICAL 9.8
- TI-2021-05589 Hard-coded credentials in EVlink City , EVlink Parking , and EVlink Smart Wallbox CVSS 3.1CRITICAL 9.8
- 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-2024-8938 · CVE Program
- CVE-2024-8938 · NVD
- FIRST EPSS
- GHSA-fv43-v7vc-rjjf · 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