Auth bypass in Schneider-Electric Modicon M340
CVE-2018-7847
A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service or potential code execution by overwriting configuration settings of the controller over Modbus.
Vulnerability class: Broken Authentication
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: 0.038 (89.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.038 · newest: 0.038 · 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)
References
- www.schneider-electric.com/en/download/document/SEVD-2019-134-11/ (Vendor Advisory)
- www.talosintelligence.com/vulnerability_reports/TALOS-2018-0742 (Exploit, Third Party Advisory)
- www.talosintelligence.com/vulnerability_reports/TALOS-2018-0743 (Third Party Advisory)
Frequently asked questions
- What is CVE-2018-7847?
- CVE-2018-7847 is a critical-severity vulnerability in Schneider-Electric Modicon M340, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-05-22.
- How severe is CVE-2018-7847?
- Critical severity. CVSS v3 base score is 9.8 out of 10.