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CVE-2026-19844

TOTOLINK A800R ipv6.so cstecgi.cgi setRadvdCfg stack-based overflow

A vulnerability was found in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component ipv6.so. Performing a manipulation of the argument radvdinterfacename results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-19813

TOTOLINK A800R firewall.so cstecgi.cgi setMacFilterRules stack-based overflow

A security vulnerability has been detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Such manipulation of the argument Comment leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-19847

TOTOLINK A800R wps.so cstecgi.cgi setWiFiWpsConfig stack-based overflow

A security flaw has been discovered in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected is the function setWiFiWpsConfig of the file /cgi-bin/cstecgi.cgi of the component wps.so. The manipulation of the argument pin results in stack-based buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-19811

TOTOLINK A800R firewall.so cstecgi.cgi setIpQosRules stack-based overflow

A security flaw has been discovered in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setIpQosRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. The manipulation of the argument Comment results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-19845

TOTOLINK A800R lan.so cstecgi.cgi setStaticDhcpConfig stack-based overflow

A vulnerability was determined in TOTOLINK A800R 4.1.2cu.5137_B20200730. This affects the function setStaticDhcpConfig of the file /cgi-bin/cstecgi.cgi of the component lan.so. Executing a manipulation of the argument Comment can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-19846

TOTOLINK A800R firewall.so cstecgi.cgi setUrlFilterRules stack-based overflow

A vulnerability was identified in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function setUrlFilterRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. The manipulation of the argument url leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-19814

TOTOLINK A800R firewall.so cstecgi.cgi setMacQos stack-based overflow

A vulnerability was detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected is the function setMacQos of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Performing a manipulation of the argument macAddress results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-19812

TOTOLINK A800R product.so cstecgi.cgi UploadCustomModule stack-based overflow

A weakness has been identified in TOTOLINK A800R 4.1.2cu.5137_B20200730. This affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component product.so. This manipulation of the argument File causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-19815

TOTOLINK A800R firewall.so cstecgi.cgi setParentalRules stack-based overflow

A flaw has been found in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected by this vulnerability is the function setParentalRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Executing a manipulation of the argument urlKeyword can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2026-6157

Totolink A800R app.so setAppEasyWizardConfig buffer overflow

A vulnerability was detected in Totolink A800R 4.1.2cu.5137_B20200730. This impacts the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. The manipulation of the argument apcliSsid results in buffer overflow. The attack can be executed remotely. The exploit is now public and may be used.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
CVE-2025-4496

TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow

A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

CVSS 4.0 · 8.7 High EPSS 1.3% KEV · Not listed
Vendors
Products
CVE-2025-28017

TOTOLINK A800R V4.1.2cu.5032_B20200408 is vulnerable to Command Injection in downloadFile.cgi via the QUERY_STRING parameter.

CVSS 3.1 · 6.5 Medium EPSS 1.2% KEV · Not listed
Vendors
CVE-2025-28018

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in downloadFile.cgi through the v14 parameter.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
CVE-2025-28019

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in the downloadFile.cgi component

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
CVE-2025-28020

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in downloadFile.cgi through the v25 parameter.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
CVE-2025-28136

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in the downloadFile.cgi.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
CVE-2025-28032

TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 contain a pre-auth buffer overflow vulnerability in the setNoticeCfg function through the IpForm parameter.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
Products
CVE-2025-28033

TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 were found to contain a pre-auth buffer overflow vulnerability in the setNoticeCfg function through the IpTo parameter.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
Products
CVE-2025-28034

TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5185_B20201128, and A3100R V4.1.2cu.5247_B20211129 were found to contain a pre-auth remote command execution vulnerability in the NTPSyncWithHost function through the hostTime parameter.

CVSS 3.1 · 9.8 Critical EPSS 1.4% KEV · Not listed
Vendors
Products
CVE-2025-28035

TOTOLINK A830R V4.1.2cu.5182_B20201102 was found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through the NoticeUrl parameter.

CVSS 3.1 · 9.8 Critical EPSS 1.4% KEV · Not listed
Vendors
Products