Credentials management flaw in Modicon Quantum with firmware versions prior to V2.40.
Priority LOW 31CWE-255Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- 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-255 Credentials Management vulnerability exists in Modicon Quantum with firmware versions prior to V2.40. which could cause a Denial Of Service when using a Telnet connection.
Why it matters now
EPSS 0.01114 66th percentileScored 2026-11-07
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 Quantum with firmware versions prior to V2.40. | Modicon Quantum with firmware versions prior to V2.40. | — | No fix listed | CNA |
- Modicon Quantum with firmware versions prior to V2.40. Vendor— Affected Modicon Quantum with firmware versions prior to V2.40. Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicon_quantum_firmware:*:*:*:*:*:*:*:* | before 2.40 | 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_quantum_firmware:*:*:*:*:*:*:*:* Versions before 2.40 Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicon_quantum:-:*:*:*:*:*:*:* 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-2018-7788
- 2026-10-03 Alias added: GHSA-4pc3-f84w-r58f
More Schneider Electric Modicon Quantum Firmware vulnerabilities
- 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-2019-04843 Missing authentication in Modicon M580 Modicon M340 Modicon Quantum Modicon Premium CVSS 3.1CRITICAL 9.8
- TI-2018-05685 Improper authentication in Modicon M580 Modicon M340 Modicon Quantum Modicon Premium CVSS 3.1CRITICAL 9.8
- TI-2019-04851 Code injection in Modicon Quantum - all firmware versions CVSS 3.0CRITICAL 9.1
Sources
- CVE-2018-7788 · CVE Program
- CVE-2018-7788 · NVD
- FIRST EPSS
- GHSA-4pc3-f84w-r58f · 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