CVE-2018-7789 describes an Improper Check for Unusual or Exceptional Conditions vulnerability affecting all versions prior to V1.6.2.0 of Schneider Electric's Modicon M221 programmable logic controllers. This vulnerability allows an unauthenticated attacker to remotely reboot affected devices by sending specially crafted programming protocol frames. With a CVSS score of 7.5 (HIGH), it presents a significant availability risk (A:H) due to its network-based attack vector (AV:N) and low attack complexity (AC:L). While there is no known public exploit code (Metasploit, Nuclei, ExploitDB) and it is not listed on the KEV catalog, the vulnerability has garnered notable community discussion and media coverage, indicating awareness within the cybersecurity community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.6.2.0CPE matchmatch criteria | cpe:2.3:o:schneider-electric:modicon_m221_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.