Resource exhaustion in Schneider-Electric Modicon M221
CVE-2018-7821
An Environment (CWE-2) vulnerability exists in SoMachine Basic, all versions, and Modicon M221(all references, all versions prior to firmware V1.10.0.0) which could cause cycle time impact when flooding the M221 ethernet interface while the Ethernet/IP adapter is activated.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.011 (65.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Schneider-Electric Modicon M221
- Schneider-Electric Modicon M221 Firmware
- Schneider-Electric Somachine Basic
- Somachine Basic And Modicon M221, Basic, All Versions References, Prior To Firmware V1.10.0.0 — versions SoMachine Basic and Modicon M221, SoMachine Basic, all versions Modicon M221, all references, all versions prior to firmware V1.10.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.schneider-electric.com/en/download/document/SEVD-2019-045-01/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2018-7821?
- CVE-2018-7821 is a high-severity vulnerability in Schneider-Electric Modicon M221, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2019-05-22.
- How severe is CVE-2018-7821?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-7821 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.