Multiple cross-site request forgery (CSRF) vulnerabilities in index.cgi on the Verizon FIOS Actiontec MI424WR-GEN3I router with firmware 40.19.36 allow remote attackers to hijack the authentication of administrators for requests that (1) add administrative accounts via the username and user_level parameters or (2) enable remote administration via the is_telnet_primary and is_telnet_secondary parameters.
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