Auth bypass in Schneider-Electric 140cpu65150
CVE-2020-7540
A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause unauthenticated command execution in the controller when sending special HTTP requests.
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: 0.023 (82.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.023 · change: +0.001
Affected products
- Schneider-Electric 140cpu65150
- Schneider-Electric 140cpu65150 Firmware
- Schneider-Electric 140cpu65160
- Schneider-Electric 140cpu65160 Firmware
- Schneider-Electric 140noc77101
- Schneider-Electric 140noc77101 Firmware
- Schneider-Electric 140noc78000
- Schneider-Electric 140noc78000 Firmware
- Schneider-Electric 140noc78100
- Schneider-Electric 140noc78100 Firmware
Weakness classification (CWE)
References
- www.se.com/ww/en/download/document/SEVD-2020-343-04/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2020-7540?
- CVE-2020-7540 is a critical-severity vulnerability in Schneider-Electric 140cpu65150, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2020-12-11.
- How severe is CVE-2020-7540?
- Critical severity. CVSS v3 base score is 9.8 out of 10.