Improper check for unusual conditions in Modicon M580 Modicon M340 Modicon Quantum…
Priority LOW 36CWE-754Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause a possible denial of Service when writing invalid memory blocks to the controller over Modbus.
Why it matters now
EPSS 0.01582 75th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Modicon M580 Modicon M340 Modicon Quantum Modicon Premium | Modicon M580 Modicon M340 Modicon Quantum Modicon Premium | — | No fix listed | CNA |
- Modicon M580 Modicon M340 Modicon Quantum Modicon Premium Vendor— Affected Modicon M580 Modicon M340 Modicon Quantum Modicon Premium Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicon_premium_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_premium:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_quantum_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_quantum:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:* | before 3.10 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:* | before 2.90 | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicon_m580:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicon_premium_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_premium:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_quantum_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_quantum:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:* Versions before 3.10 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m340:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicon_m580_firmware:*:*:*:*:*:*:*:* Versions before 2.90 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_m580:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-7856
- 2026-10-03 Alias added: GHSA-g8pp-m4fh-wjg4
References
More Schneider Electric Modicon M340 Firmware vulnerabilities
- 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
- TI-2018-05680 Authentication bypass by spoofing in Modicon M580 Modicon M340 Modicon Quantum Modicon… CVSS 3.1CRITICAL 9.8
- TI-2018-05684 Exposure of resource to wrong sphere in Modicon M580 Modicon M340 Modicon Quantum Modicon… CVSS 3.1CRITICAL 9.8
- TI-2019-04884 Information disclosure in Modicon M580, Modicon M340, Modicon Premium , Modicon Quantum CVSS 3.1HIGH 7.5
- TI-2019-04843 Missing authentication in Modicon M580 Modicon M340 Modicon Quantum Modicon Premium CVSS 3.1CRITICAL 9.8
Sources
- CVE-2018-7856 · CVE Program
- CVE-2018-7856 · NVD
- FIRST EPSS
- GHSA-g8pp-m4fh-wjg4 · 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