A vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910 and classified as critical. Affected by this issue is the function loginAuth of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument password leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-249854 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain a stack overflow via the http_host parameter in the function loginAuth.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an authenticated stack overflow via the text parameter in the setSmsCfg function.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an authenticated stack overflow via the pppoeUser parameter in the setOpModeCfg function.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an authenticated stack overflow via the ip parameter in the setDiagnosisCfg function.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain a command injection vulnerability via the OpModeCfg function at /cgi-bin/cstecgi.cgi.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an authenticated stack overflow via the week, sTime, and eTime parameters in the setParentalRules function.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an authenticated stack overflow via the command parameter in the setTracerouteCfg function.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an unauthenticated stack overflow via the "main" function.

TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an authenticated stack overflow via the sPort/ePort parameter in the setIpPortFilterRules function.