Denial of Service Vulnerability in P-Net by RT-Labs

CVE-2026-111731

What is CVE-2026-111731?

P-Net versions before 1.0.3 are affected by a vulnerability that causes the system to enter an infinite loop while processing a read request for the PDPortDataCheck record with subslot 0. As a result, the port scanning process fails to progress, leading to a critical denial of service where the device becomes unresponsive. This issue can be exploited by an unauthenticated remote attacker, resulting in significant service disruption.

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