MediumPublished 2023-12-02 · 3d ago
ICSA-23-336-03 · CVE-2023-50229
MELSEC iQ-R denial of service via MELSOFT
A malformed MELSOFT packet causes the CPU to halt; recovery requires manual restart. Pre-auth, network-adjacent.
Mitigations
- 01Update CPU firmware ≥ 60
- 02Limit MELSOFT TCP/5007 to engineering subnet