CVE-2018-7791 is a critical permissions vulnerability affecting all versions of Schneider Electric Modicon M221 firmware prior to V1.6.2.0. An unauthenticated attacker can exploit this flaw to overwrite the PLC's password, subsequently gaining the ability to upload the original program. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low complexity, and high impact on confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the potential for complete control over affected PLCs makes remediation crucial.
| 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:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.