CVE-2025-3755 is a critical vulnerability affecting Mitsubishi Electric MELSEC iQ-F Series CPU modules, stemming from improper validation of input indices. An unauthenticated remote attacker can exploit this to read sensitive information, cause a Denial-of-Service (DoS) condition in MELSOFT connections, or halt the CPU module's operation, requiring a manual reset for recovery. With a CVSS score of 9.1 (CRITICAL), it is easily exploitable over the network with no user interaction, leading to high confidentiality and availability impacts. Currently, there is no public exploit code available, nor is it listed on the CISA KEV catalog, and it has received minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Mitsubishi Electric Corporation | MELSEC IQ-F Series FX5S-30MR/DS | All versionsCNA affecteddefault unaffected | |
| Mitsubishi Electric Corporation | MELSEC IQ-F Series FX5S-30MR/ES | All versionsCNA affecteddefault unaffected | |
| Mitsubishi Electric Corporation | MELSEC IQ-F Series FX5S-30MT/DS | All versionsCNA affecteddefault unaffected | |
| Mitsubishi Electric Corporation | MELSEC IQ-F Series FX5S-30MT/DSS | All versionsCNA affecteddefault unaffected | |
| Mitsubishi Electric Corporation | MELSEC IQ-F Series FX5S-30MT/ES | All versionsCNA affecteddefault unaffected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.