CVE-2018-7789
No exploitation reported by the sources we read.
- Published2018-08-29
- Fixed in1.6.2.0
- WeaknessCWE-754
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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
dates in UTC- 2018-08-2920:29CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-7789?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-7789?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.6 | < 1.6.2.0 | 1.6.2.0 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Schneider Electric Modicon M221
Modicon M221: all references and versions prior to firmware v1.6.2.0
Fix
- Update Schneider-electric modicon m221 firmware to 1.6.2.0
- Vendor fix CISA ICSA-18-240-02 · 1 productSchneider Electric reports that a fix for this vulnerability is implemented in Modicon M221 Firmware v1.6.2.0, delivered within SoMachine Basic v1.6 SP2, or by using the Schneider Electric Software Update tool.
- Mitigation from the vendor CISA ICSA-18-240-02 · 1 productThe download for SoMachine Basic is available at:
- Mitigation from the vendor CISA ICSA-18-240-02 · 1 productFor more information, see the Schneider Electric security notification at:
Advisories and patches
- ics-cert.us-cert.govMitigation
- www.schneider-electric.comMitigation · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2018-08-29
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2018-7789?
Is CVE-2018-7789 actively exploited?
What is the CVSS score for CVE-2018-7789?
Hear about the next vulnerability in your software
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
- Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.
Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.