CVE-2017-6026 describes an insufficient randomization vulnerability in Schneider Electric Modicon M241 and M251 PLCs, specifically in firmware versions prior to 4.0.5.11. The web application's session numbers lack proper randomization and are shared, enabling potential session compromise. This critical vulnerability (CVSS 9.1) has a low attack complexity and no user interaction required, allowing an unauthenticated attacker to achieve high confidentiality and integrity impacts. While not listed on CISA's KEV catalog or Hot List, an exploit is publicly available on ExploitDB, and it has garnered some community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.0.3.20CPE matchmatch criteria | cpe:2.3:o:schneider-electric:modicon_m251_firmware:*:*:*:*:*:*:*:* | ||
<= 4.0.3.20CPE matchmatch criteria | cpe:2.3:o:schneider-electric:modicon_m241_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:N
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.
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.