Tenda AC21 vulnerabilities

CVE-2026-4565 High · 8.8 CWE-119 Mar 22, 2026

Tenda AC21 SetNetControlList formSetQosBand buffer overflow

A vulnerability was detected in Tenda AC21 16.03.08.16. Impacted is the function formSetQosBand of the file /goform/SetNetControlList. Performing a manipulation of the argument list results in buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used.

CVE-2026-2148 High · 7.5 CWE-200 Feb 8, 2026

Tenda AC21 Web Management DownloadFlash information disclosure

A security vulnerability has been detected in Tenda AC21 16.03.08.16. Affected is an unknown function of the file /cgi-bin/DownloadFlash of the component Web Management Interface. The manipulation leads to information disclosure. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

CVE-2026-2147 Medium · 5.3 CWE-200 Feb 8, 2026

Tenda AC21 Web Management DownloadLog information disclosure

A weakness has been identified in Tenda AC21 16.03.08.16. This impacts an unknown function of the file /cgi-bin/DownloadLog of the component Web Management Interface. Executing a manipulation can lead to information disclosure. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.

CVE-2026-1638 High · 8.8 CWE-77 Jan 29, 2026

Tenda AC21 mDMZSetCfg command injection

A security flaw has been discovered in Tenda AC21 1.1.1.1/1.dmzip/16.03.08.16. The impacted element is the function mDMZSetCfg of the file /goform/mDMZSetCfg. The manipulation of the argument dmzIp results in command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

CVE-2026-1637 High · 8.8 CWE-119 Jan 29, 2026

Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow

A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

CVE-2025-13446 Critical · 9.8 CWE-119 Nov 20, 2025

Tenda AC21 SetSysTimeCfg stack-based overflow

A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

CVE-2025-13445 Critical · 9.8 CWE-119 Nov 20, 2025

Tenda AC21 SetIpMacBind stack-based overflow

A flaw has been found in Tenda AC21 16.03.08.16. This affects an unknown part of the file /goform/SetIpMacBind. Executing a manipulation of the argument list can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.

CVE-2025-12611 Critical · 9.8 CWE-120 Nov 3, 2025

Tenda AC21 SetPptpServerCfg formSetPPTPServer buffer overflow

A vulnerability was identified in Tenda AC21 16.03.08.16. This vulnerability affects the function formSetPPTPServer of the file /goform/SetPptpServerCfg. The manipulation of the argument startIp leads to buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

CVE-2025-11091 High · 8.8 CWE-119 Sep 27, 2025

Tenda AC21 SetStaticRouteCfg sscanf buffer overflow

A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.

CVE-2025-10838 High · 8.8 CWE-119 Sep 23, 2025

Tenda AC21 WifiExtraSet sub_45BB10 buffer overflow

A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function sub_45BB10 of the file /goform/WifiExtraSet. The manipulation of the argument wpapsk_crypto leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.