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CVE-2026-1637

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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CVE-2026-1638

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.

CVSS 4.0 · 5.3 Medium EPSS 2.2% KEV · Not listed
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CVE-2026-2147

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.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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CVE-2026-2148

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.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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CVE-2026-4565

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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CVE-2025-13445

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.

CVSS 4.0 · 8.7 High EPSS 4.2% KEV · Not listed
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CVE-2025-13446

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.

CVSS 4.0 · 8.7 High EPSS 4.2% KEV · Not listed
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CVE-2025-12611

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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CVE-2025-65220

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow in: /goform/SetVirtualServerCfg via the list parameter.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2025-65221

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the list parameter of /goform/setPptpUserList.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2025-65222

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the rebootTime parameter of /goform/SetSysAutoRebbotCfg.

CVSS 3.1 · 4.3 Medium EPSS 2.5% KEV · Not listed
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CVE-2025-65223

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the urls parameter of /goform/saveParentControlInfo.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2025-65226

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the deviceId parameter in /goform/saveParentControlInfo.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2025-10838

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.

CVSS 4.0 · 8.7 High EPSS 1.1% KEV · Not listed
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CVE-2025-11091

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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CVE-2025-9605

Tenda AC21/AC23 GetParentControlInfo stack-based overflow

A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function GetParentControlInfo of the file /goform/GetParentControlInfo. Such manipulation of the argument mac leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

CVSS 4.0 · 9.3 Critical EPSS 6.0% KEV · Not listed
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Ac21 Ac21 Firmware Ac23 and 1 more
CVE-2023-24333

A stack overflow vulnerability in Tenda AC21 with firmware version US_AC21V1.0re_V16.03.08.15_cn_TDC01 allows attackers to run arbitrary commands via crafted POST request to /goform/openSchedWifi.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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CVE-2022-40076

Tenda AC21 V16.03.08.15 is vulnerable to Buffer Overflow via /bin/httpd, function: fromSetWifiGusetBasic.

CVSS 3.1 · 7.5 High EPSS 1.0% KEV · Not listed
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