Our takeCISA published an advisory on a timing-based tampering flaw in Mitsubishi Electric's CC-Link IE TSN protocol that can let a same-segment attacker force a DoS on control functions. If you use these PLCs, isolate them from untrusted network segments and review remote access.Cyber Resilience desk
Sources (1)
- cisa_advisories · cisa_advisories
What this means for you — Security leader:Apply the Mitsubishi Electric patch or mitigations in ICSA-26-211-07 for CC-Link IE TSN. If you operate affected industrial controllers on shared network segments, restrict traffic to only required devices and monitor for anomalous packets.
What this means for you — Lean IT orgs:If you use Mitsubishi Electric automation equipment that speaks CC-Link IE TSN, check the advisory and apply the vendor fix or network restrictions. Most small teams should simply isolate the control network from general IT traffic.
What this means for you — MSP:Review client environments running Mitsubishi Electric CC-Link IE TSN devices and apply the fixes listed in ICSA-26-211-07. Segment OT networks and limit which devices can send packets to these controllers.
What this means for you — Researcher:Review the timing-based packet tampering flaw in Mitsubishi Electric CC-Link IE TSN. Successful exploitation allows DoS against control functions from the same network segment.