CVE-2018-7789
An Improper Check for Unusual or Exceptional Conditions vulnerability exists in Schneider Electric's Modicon M221 product (all references,…
- Published
- Updated
- Reserved
- Assigned by
- schneider
Description
An Improper Check for Unusual or Exceptional Conditions 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 remotely reboot Modicon M221 using crafted programing protocol frames.
Timeline
ID reserved
By schneider
- 6 months later
· 6 months later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 2.8% · top 13% of all CVEs (9 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.8.
Weakness
- Improper Check for Unusual or Exceptional Conditions
- CWE-754 Improper Check for Unusual or Exceptional Conditions (opens in a new tab)All about CWE-754 and its CVEs
Affected products
Schneider Electric SE · Modicon M221, all references, all versions prior to firmware V1.6.2.0
- affected Modicon M221, all references, all versions prior to firmware V1.6.2.0
References (3)
- https://ics-cert.us-cert.gov/advisories/ICSA-18-240-02 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.schneider-electric.com/en/download/document/SEVD-2018-233-01/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- 105171 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2018-19501 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-7789)Record last updated .