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An attacker can send a malicious packet to trigger this vulnerability.This vulnerability affects the NetX Duo Web Component HTTP Server implementation which can be found in x-cube-azrtos-f7\\Middlewares\\ST\\netxduo\\addons\\web\\nx_web_http_server.c","An integer underflow vulnerability exists in the HTTP server PUT request functionality of STMicroelectronics X-CUBE-AZRTOS-WL 2.0.0. 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