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Industrial Router Security: When SMS Authentication Fails Open | CUP Micro Brief
An industrial router disables SMS password checks after five failed attempts. This CUP Micro Brief examines the availability logic behind the fail-open design and why it becomes dangerous on a cellular attack surface.
Related CUP episodes:
Weidmüller Router Security: When Segmentation Becomes an Attack Path
Industrial Network Security: Designing for Operational Resilience
Legacy VPNs in OT: Remote Access and the Cost of Disruption
OT Remote Access: Closing the Path When the Work Ends
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