A command injection vulnerability exists in the ToToLink A720R Router firmware V4.1.5cu.614B20230630 within the sysconf binary, specifically in the sub40BFA4 function that handles network interface reinitialization from '/var/system/linuxvlanreinit'. Input is only partially validated by checking the prefix of interface names, and is concatenated into shell commands executed via system() without escaping. An attacker with write access to this file can execute arbitrary commands on the device.

A stack buffer overflow exists in the ToToLink A720R Router firmware V4.1.5cu.614B20230630 within the sysconf binary (sub401EE0 function). The binary reads the /proc/stat file using fgets() into a local buffer and subsequently parses the line using sscanf() into a single-byte variable with the %s format specifier. Maliciously crafted /proc/stat content can overwrite adjacent stack memory, potentially allowing an attacker with filesystem write privileges to execute arbitrary code on the device.

A local stack-based buffer overflow vulnerability exists in the infostat.cgi and cstecgi.cgi binaries of ToToLink routers (A720R V4.1.5cu.614B20230630, LR1200GB V9.1.0u.6619B20230130, and NR1800X V9.1.0u.6681B20230703). Both programs parse the contents of /proc/net/arp using sscanf() with "%s" format specifiers into fixed-size stack buffers without length validation. Specifically, one function writes user-controlled data into a single-byte buffer, and the other into adjacent small arrays without bounds checking. An attacker who controls the contents of /proc/net/arp can trigger memory corruption, leading to denial of service or potential arbitrary code execution.

A command injection vulnerability exists in the ToToLink A720R Router firmware V4.1.5cu.614B20230630 within the cloudupdatecheck binary, specifically in the sub402414 function that handles cloud update parameters. User-supplied 'magicid' and 'url' values are directly concatenated into shell commands and executed via system() without any sanitization or escaping. An unauthenticated remote attacker can exploit this vulnerability to execute arbitrary commands on the device.

A security flaw has been discovered in TOTOLINK A720R 4.1.5cu.630B20250509. This issue affects the function setParentalRules of the file /cgi-bin/cstecgi.cgi. Performing manipulation of the argument desc results in buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be exploited.

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument topicurl with the input showSyslog leads to information disclosure. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been classified as problematic. Affected is an unknown function of the file /cgi-bin/cstecgi.cgi of the component Config Handler. The manipulation of the argument topicurl with the input getInitCfg/getSysStatusCfg leads to information disclosure. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374 and classified as critical. This issue affects some unknown processing of the file /cgi-bin/cstecgi.cgi of the component Log Handler. The manipulation of the argument topicurl with the input clearDiagnosisLog/clearSyslog/clearTracerouteLog leads to improper access controls. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

A vulnerability has been found in TOTOLINK A720R 4.1.5cu.374 and classified as critical. This vulnerability affects unknown code of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument topicurl with the input RebootSystem leads to missing authentication. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

TOTOLINK A720R V4.1.5cu.532 B20210610 is vulnerable to Incorrect Access Control.

A vulnerability classified as critical has been found in TOTOLINK A720R 4.1.5. Affected is the function exportOvpn. The manipulation leads to os command injection. It is possible to launch the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The vendor was contacted early about this disclosure but did not respond in any way.

TOTOLINK A720R v4.1.5cu.470B20200911 was discovered to contain a command injection vulnerability in the "Main" function. This vulnerability allows attackers to execute arbitrary commands via the QUERYSTRING parameter.

TOTOLINK A720R v4.1.5cu.470B20200911 was discovered to contain a stack overflow in the setWiFiWpsStart function. This vulnerability allows attackers to cause a Denial of Service (DoS) via the pin parameter.

TOTOLINK A720R v4.1.5cu.470B20200911 was discovered to contain a stack overflow in the FormLogin function. This vulnerability allows attackers to cause a Denial of Service (DoS) via the Host parameter.

TOTOLINK A720R v4.1.5cu.470B20200911 was discovered to contain a stack overflow in the FormLogin function. This vulnerability allows attackers to cause a Denial of Service (DoS) via the flag parameter.

Totolink devices A3100R v4.1.2cu.5050B20200504, A830R v5.9c.4729B20191112, and A720R v4.1.5cu.470B20200911 were discovered to contain command injection vulnerability in the function setNoticeCfg. This vulnerability allows attackers to execute arbitrary commands via the IpFrom parameter.

Totolink devices A3100R v4.1.2cu.5050B20200504, A830R v5.9c.4729B20191112, and A720R v4.1.5cu.470B20200911 were discovered to contain a stack overflow in the function setNoticeCfg. This vulnerability allows attackers to cause a Denial of Service (DoS) via the IpTo parameter.

totolink EX300v2, ver V4.0.3c.140B20210429 and A720R ,ver V4.1.5cu.470B20200911 have an issue which causes uncontrolled resource consumption.

A vulnerability in the FormLogin function of TOTOLINK A720R A720RFirmware V4.1.5cu.470B20200911 allows attackers to bypass authentication.

A vulnerability in TOTOLINK A720R A720RFirmware v4.1.5cu.470B20200911 allows attackers to start the Telnet service, then login with the default credentials via a crafted POST request.

A stack overflow in the checkLoginUser function of TOTOLINK A720R A720RFirmware v4.1.5cu.470B20200911 allows attackers to cause a denial of service (DOS).

A vulnerability in TOTOLINK A720R router with firmware v4.1.5cu.470B20200911 allows attackers to download the configuration file via sending a crafted HTTP request.

Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470B20200911 allows remote attackers to execute arbitrary OS commands by sending a modified HTTP request. This occurs because the function executes glibc's system function with untrusted input. In the function, "ip" parameter is directly passed to the attacker, allowing them to control the "ip" field to attack the OS.

Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470B20200911 allows remote attackers to execute arbitrary OS commands by sending a modified HTTP request. This occurs because the function executes glibc's system function with untrusted input. In the function, "command" parameter is directly passed to the attacker, allowing them to control the "command" field to attack the OS.

TOTOLINK-720R v4.1.5cu.374 was discovered to contain a remote code execution (RCE) vulnerability via the setdiagnosicfg function.

TOTOLINK-720R v4.1.5cu.374 was discovered to contain a remote code execution (RCE) vulnerability via the setTracerouteCfg function.

TOTOLINK A720R V4.1.5cu.532B20210610 was discovered to contain a hardcoded password for root at /etc/shadow.sample.

TOTOLink A720R V4.1.5cu.532B20210610 was discovered to contain a command injection vulnerability via the username parameter in /cstecgi.cgi.