Totolink vulnerabilities

CVE-2026-4976 High · 8.8 CWE-119 Mar 27, 2026

Totolink LR350 cstecgi.cgi setWiFiGuestCfg buffer overflow

A vulnerability was found in Totolink LR350 9.3.5u.6369_B20220309. This vulnerability affects the function setWiFiGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ssid results in buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used.

CVE-2026-4611 High · 8.8 CWE-78 Mar 23, 2026

TOTOLINK X6000R shttpd setLanCfg privilege escalation

A flaw has been found in TOTOLINK X6000R 9.4.0cu.1360_B20241207/9.4.0cu.1498_B20250826. Affected by this issue is the function setLanCfg of the file /usr/sbin/shttpd. Executing a manipulation of the argument Hostname can lead to os command injection. The attack may be launched remotely.

CVE-2026-4497 Critical · 9.8 CWE-78 Mar 20, 2026

Totolink WA300 cstecgi.cgi recvUpgradeNewFw os command injection

A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. Affected by this issue is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.

CVE-2026-3696 Critical · 9.8 CWE-78 Mar 7, 2026

Totolink N300RH CGI cstecgi.cgi setWiFiWpsConfig os command injection

A vulnerability was found in Totolink N300RH 6..1c.1353_B20190305. The affected element is the function setWiFiWpsConfig of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation results in os command injection. The attack can be initiated remotely. The exploit has been made public and could be used.

CVE-2026-3301 Critical · 9.8 CWE-78 Feb 27, 2026

Totolink N300RH Web Management cstecgi.cgi setWebWlanIdx os command injection

A security flaw has been discovered in Totolink N300RH 6.1c.1353_B20190305. Affected by this vulnerability is the function setWebWlanIdx of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument webWlanIdx results in os command injection. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.

CVE-2025-67445 High · 7.5 CWE-400 Feb 24, 2026

Uncontrolled Resource Consumption in Totolink X5000r Firmware

TOTOLINK X5000R V9.1.0cu.2415_B20250515 contains a denial-of-service vulnerability in /cgi-bin/cstecgi.cgi. The CGI reads the CONTENT_LENGTH environment variable and allocates memory using malloc (CONTENT_LENGTH + 1) without sufficient bounds checking. When lighttpd s request size limit is not enforced, a crafted large POST request can cause memory exhaustion or a segmentation fault, leading to a crash of the management CGI and loss of availability of the web interface.

CVE-2025-70328 High · 8.8 CWE-78 Feb 23, 2026

OS Command Injection in Totolink X6000r Firmware

TOTOLINK X6000R v9.4.0cu.1498_B20250826 contains an OS command injection vulnerability in the NTPSyncWithHost handler of the /usr/sbin/shttpd executable. The host_time parameter is retrieved via sub_40C404 and passed to a date -s shell command through CsteSystem. While the first two tokens of the input are validated, the remainder of the string is not sanitized, allowing authenticated attackers to execute arbitrary shell commands via shell metacharacters.

CVE-2025-70327 Critical · 9.8 CWE-88 Feb 23, 2026

Argument Injection in Totolink X5000r Firmware

TOTOLINK X5000R v9.1.0cu_2415_B20250515 contains an argument injection vulnerability in the setDiagnosisCfg handler of the /usr/sbin/lighttpd executable. The ip parameter is retrieved via websGetVar and passed to a ping command through CsteSystem without validating if the input starts with a hyphen (-). This allows remote authenticated attackers to inject arbitrary command-line options into the ping utility, potentially leading to a Denial of Service (DoS) by causing excessive resource consumption or prolonged execution.

CVE-2025-70329 High · 8.0 CWE-78 Feb 23, 2026

OS Command Injection in Totolink X5000r Firmware

TOTOLink X5000R v9.1.0cu_2415_B20250515 contains an OS command injection vulnerability in the setIptvCfg handler of the /usr/sbin/lighttpd executable. The vlanVidLan1 (and other vlanVidLanX) parameters are retrieved via Uci_Get_Str and passed to the CsteSystem function without adequate validation or filtering. This allows an authenticated attacker to execute arbitrary shell commands with root privileges by injecting shell metacharacters into the affected parameters.

CVE-2026-26736 High · 8.8 CWE-787 Feb 17, 2026

Out-of-bounds Write in Totolink A3002ru Firmware

TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the static_ipv6 parameter in the formIpv6Setup function.

CVE-2026-26732 High · 8.8 CWE-787 Feb 17, 2026

Out-of-bounds Write in Totolink A3002ru Firmware

TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer overflow via the vpnUser or vpnPassword` parameters in the formFilter function.

CVE-2026-26731 High · 8.8 CWE-787 Feb 17, 2026

Out-of-bounds Write in Totolink A3002ru Firmware

TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer overflow via the routernamer`parameter in the formDnsv6 function.

CVE-2026-2167 High · 8.8 CWE-78 Feb 8, 2026

Totolink WA300 cstecgi.cgi setAPNetwork os command injection

A vulnerability was detected in Totolink WA300 5.2cu.7112_B20190227. The impacted element is the function setAPNetwork of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument Ipaddr results in os command injection. The attack may be performed from remote. The exploit is now public and may be used.

CVE-2025-67189 Medium · 6.5 CWE-120 Feb 3, 2026

Classic Buffer Overflow in Totolink A950rg Firmware

A buffer overflow vulnerability exists in the setParentalRules interface of TOTOLINK A950RG V4.1.2cu.5204_B20210112. The urlKeyword parameter is not properly validated, and the function concatenates multiple user-controlled fields into a fixed-size stack buffer without performing boundary checks. A remote attacker can exploit this flaw to cause denial of service or potentially achieve arbitrary code execution.

CVE-2025-67188 Critical · 9.8 CWE-120 Feb 3, 2026

TOTOLINK A950RG Stack Buffer Overflow in setRadvdCfg (CVE-2025-67188)

A buffer overflow vulnerability exists in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The issue resides in the setRadvdCfg interface of the /lib/cste_modules/ipv6.so module. The function fails to properly validate the length of the user-controlled radvdinterfacename parameter, allowing remote attackers to trigger a stack buffer overflow.

CVE-2025-67187 Critical · 9.8 CWE-121 Feb 3, 2026

TOTOLINK A950RG Stack-based Buffer Overflow in setIpQosRules

A stack-based buffer overflow vulnerability was identified in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The flaw exists in the setIpQosRules interface of /lib/cste_modules/firewall.so where the comment parameter is not properly validated for length.

CVE-2025-67186 Critical · 9.8 CWE-120 Feb 3, 2026

TOTOLINK A950RG Buffer Overflow in setUrlFilterRules (CVE-2025-67186)

TOTOLINK A950RG V4.1.2cu.5204_B20210112 contains a buffer overflow vulnerability in the setUrlFilterRules interface of /lib/cste_modules/firewall.so. The vulnerability occurs because the `url` parameter is not properly validated for length, allowing remote attackers to trigger a buffer overflow, potentially leading to arbitrary code execution or denial of service.

CVE-2026-1723 Critical · 9.2 CWE-78 Jan 30, 2026

TOTOLINK X6000R OS Command Injection (CVE-2026-1723)

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in TOTOLINK X6000R allows OS Command Injection.This issue affects X6000R: through V9.4.0cu.1498_B20250826.

CVE-2026-1686 High · 8.8 CWE-119 Jan 30, 2026

Totolink A3600R app.so setAppEasyWizardConfig buffer overflow

A security flaw has been discovered in Totolink A3600R 5.9c.4959. This issue affects the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. Performing a manipulation of the argument apcliSsid results in buffer overflow. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.

CVE-2026-1623 Medium · 6.3 CWE-74 Jan 29, 2026

Totolink A7000R cstecgi.cgi setUpgradeFW command injection

A weakness has been identified in Totolink A7000R 4.1cu.4154. Impacted is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument FileName causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

CVE-2026-1601 Medium · 6.3 CWE-74 Jan 29, 2026

Totolink A7000R cstecgi.cgi setUploadUserData command injection

A weakness has been identified in Totolink A7000R 4.1cu.4154. The impacted element is the function setUploadUserData of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument FileName can lead to command injection. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.

CVE-2026-1548 High · 8.8 CWE-77 Jan 28, 2026

Totolink A7000R cstecgi.cgi CloudACMunualUpdateUserdata command injection

A flaw has been found in Totolink A7000R 4.1cu.4154. This impacts the function CloudACMunualUpdateUserdata of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument url causes command injection. The attack can be initiated remotely. The exploit has been published and may be used.

CVE-2026-1547 Critical · 9.8 CWE-77 Jan 28, 2026

Totolink A7000R Firmware Command Injection in cstecgi.cgi (CVE-2026-1547)

A vulnerability was detected in Totolink A7000R 4.1cu.4154. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name results in command injection. It is possible to launch the attack remotely. The exploit is now public and may be used.

CVE-2026-1328 High · 8.8 CWE-119 Jan 22, 2026

Totolink NR1800X POST Request cstecgi.cgi setWizardCfg buffer overflow

A vulnerability was detected in Totolink NR1800X 9.1.0u.6279_B20210910. Impacted is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Performing a manipulation of the argument ssid results in buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.

CVE-2026-1327 High · 8.8 CWE-74 Jan 22, 2026

Totolink NR1800X POST Request cstecgi.cgi setTracerouteCfg command injection

A security vulnerability has been detected in Totolink NR1800X 9.1.0u.6279_B20210910. This issue affects the function setTracerouteCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Such manipulation of the argument command leads to command injection. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.