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CVE-2026-54410: CWE-193 Off-by-one Error in debevv nanoMODBUSCVE-2026-54410 0 nanoMODBUS through v1.23.0 contains an off-by-one buffer overflow in the recv_msg_header() function of the Modbus/TCP server that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of the 260-byte receive buffer by sending a crafted MBAP frame whose Length field is set to 255. The overflow corrupts the adjacent buffer-index field of the nanoMODBUS state structure, resulting in denial of service through invalid memory accesses and, on bare-metal and RTOS targets without memory protection, one-byte information disclosure and writes to unintended register addresses on the Write Multiple Registers (FC16) handler path. Join the discussion | CVE Database V5 | 06/14/2026, 17:10:12 UTC Added: 06/14/2026, 17:24:25 UTC |
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