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NR256CN (<= 1.5.140116)

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critical advisory

Pre-Authentication Stack Overflow in Netcore NR256CN Routers

Netcore NR256CN routers up to version 1.5.140116 are vulnerable to a pre-authentication stack buffer overflow in the Boa web server's user_ok() function, allowing remote code execution or denial-of-service.

NR256CN cve-2026-111711 vulnerability network-device remote-code-execution denial-of-service network-infrastructure
2t 1c