Vulnerability in Schneider-Electric Modicon M221
CVE-2018-7790
An Information Management Error vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to replay authentication sequences. If an attacker exploits this vulnerability and connects to a Modicon M221, the attacker can upload the original program from the PLC.
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: 0.025 (84.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000
Affected products
- Schneider-Electric Modicon M221
- Schneider-Electric Modicon M221 Firmware
- Schneider Electric Se Modicon M221, All References, Versions Prior To Firmware V1.6.2.0 — versions Modicon M221, all references, all versions prior to firmware V1.6.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/105182 (VDB Entry, Third Party Advisory, vdb-entry)
- www.schneider-electric.com/en/download/document/SEVD-2018-235-01/ (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-7790?
- CVE-2018-7790 is a critical-severity vulnerability in Schneider-Electric Modicon M221, classified under Authentication Bypass by Capture-replay. CVSS score: 9.8/10. Published 2018-08-29.
- How severe is CVE-2018-7790?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-7790 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.