CVE-2025-51986

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in the demo/LINUXTCP implementation of cwalter-at freemodbus v.2018-09-12 allowing attackers to reach an infinite loop via a crafted length value for a packet.

Published 2025-08-14. Last modified 2026-06-17.