Weak password recovery in Schneider Electric Embedded Web Servers in all Modicon M340…
Priority MEDIUM 48CWE-640Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-640.
Summary
An Unverified Password Change vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 which could allow an unauthenticated remote user to access the change password function of the web server
Why it matters now
EPSS 0.03499 89th 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 |
|---|---|---|---|---|---|
| Schneider Electric | Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 | Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 | — | No fix listed | CNA |
- Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 VendorSchneider Electric Affected Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicom_m340_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicom_m340:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicom_premium_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicom_premium:*:*:*:*:*:*:*:* | all versions | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicom_quantum_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicom_quantum:*:*:*:*:*:*:*:* | all versions | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicom_bmxnor0200h_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicom_bmxnor0200h:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicom_m340_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicom_m340:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicom_premium_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicom_premium:*:*:*:*:*:*:*:* Versions all versions Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicom_quantum_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicom_quantum:*:*:*:*:*:*:*:* Versions all versions Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicom_bmxnor0200h_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicom_bmxnor0200h:-:*:*:*:*:*:*:* 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-2018-7811
- 2026-10-03 Alias added: GHSA-cqmj-26m2-wvgh
References
More Schneider Electric Modicom Bmxnor0200h Firmware vulnerabilities
- TI-2018-05649 Weak password recovery in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0CRITICAL 9.8
- TI-2018-05669 Cross-site request forgery in Schneider Electric Embedded Web Servers in all Modicon… CVSS 3.0HIGH 8.8
- TI-2018-05652 Information disclosure in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0HIGH 7.5
- TI-2018-05668 HTTP response splitting in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0HIGH 7.5
- TI-2018-05671 Improper check for unusual conditions in Schneider Electric Embedded Web Servers in all… CVSS 3.0HIGH 7.5
- TI-2018-05650 Cross-site scripting in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0MEDIUM 6.1
Sources
- CVE-2018-7811 · CVE Program
- CVE-2018-7811 · NVD
- FIRST EPSS
- GHSA-cqmj-26m2-wvgh · 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