Vulnerability in Schneider-Electric Modicon M340
CVE-2018-7846
A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause unauthorized access by conducting a brute force attack on Modbus protocol to the controller.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.296 (98.1th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.296 · newest: 0.296 · change: 0.000
Affected products
- Schneider-Electric Modicon M340
- Schneider-Electric Modicon M340 Firmware
- Schneider-Electric Modicon M580
- Schneider-Electric Modicon M580 Firmware
- Schneider-Electric Modicon Premium
- Schneider-Electric Modicon Premium Firmware
- Schneider-Electric Modicon Quantum
- Schneider-Electric Modicon Quantum Firmware
- Modicon M580 M340 Quantum Premium — versions Modicon M580 Modicon M340 Modicon Quantum Modicon Premium
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.schneider-electric.com/en/download/document/SEVD-2019-134-11/ (Vendor Advisory)
- www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-7846?
- CVE-2018-7846 is a critical-severity vulnerability in Schneider-Electric Modicon M340, classified under Exposure of Resource to Wrong Sphere. CVSS score: 9.8/10. Published 2019-05-22.
- How severe is CVE-2018-7846?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-7846 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.