CVE-2026-111731

Description

P-Net before 1.0.3 enters an infinite loop when handling a read request for the PDPortDataCheck record with subslot 0 (whole module). The loop over the ports never advanced to the next port, so the request never completes and the device stops responding. A remote unauthenticated attacker can use this to cause a denial of service.

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Weakness Type (CWE)

CWE-835 CWE-835

References

Other References

https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf

Frequently Asked Questions

What is CVE-2026-111731? +

P-Net before 1.0.3 enters an infinite loop when handling a read request for the PDPortDataCheck record with subslot 0 (whole module). The loop over the ports never advanced to the next port, so the request never completes and the device stops responding. A remote unauthenticated attacker can use this to cause a denial of service.

How do I check if I'm vulnerable to CVE-2026-111731? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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