Vulnerability in Schneider-Electric Modicon M340
CVE-2018-7842
A CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause an elevation of privilege by conducting a brute force attack on Modbus parameters sent 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: 0.350 (98.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.350 · newest: 0.350 · 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-2018-0741 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-7842?
- CVE-2018-7842 is a critical-severity vulnerability in Schneider-Electric Modicon M340, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2019-05-22.
- How severe is CVE-2018-7842?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-7842 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.