CVE-2021-37400 is a critical vulnerability affecting Idec PLCs, allowing an unauthenticated attacker to intercept user credentials during communication between the PLC and its software. This enables unauthorized upload, alteration, or download of the PLC user program, leading to complete compromise of the industrial control system. With a CVSS score of 9.8 (CRITICAL), the vulnerability is easily exploitable over the network with no user interaction required, resulting in high impact to confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the high severity warrants immediate attention and mitigation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.12.1CPE matchmatch criteria | cpe:2.3:a:idec:data_file_manager:*:*:*:*:*:*:*:* | ||
<= 1.3.1CPE matchmatch criteria | cpe:2.3:a:idec:windedit:*:*:*:*:*:*:*:* | ||
<= 8.19.1CPE matchmatch criteria | cpe:2.3:a:idec:windldr:*:*:*:*:*:*:*:* | ||
<= 2.31CPE matchmatch criteria | cpe:2.3:o:idec:microsmart_plus_fc6b_firmware:*:*:*:*:*:*:*:* | ||
<= 1.91CPE matchmatch criteria | cpe:2.3:o:idec:microsmart_plus_fc6a_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.