Tenda W20E 16.01.0.6 Telnet Daemon /goform/telnet privileges management

Summaryinfo

A vulnerability marked as very critical has been reported in Tenda W20E 16.01.0.6. Impacted is an unknown function of the file /goform/telnet of the component Telnet Daemon. The manipulation leads to privileges management. This vulnerability is documented as CVE-2026-67966. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Tenda W20E 16.01.0.6 and classified as very critical. This issue affects an unknown code of the file /goform/telnet of the component Telnet Daemon. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Tenda W20E V16.01.0.6(2782) /goform/telnet endpoint allows unauthenticated remote attackers to activate the Telnet daemon and obtain root shell access.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-67966 since 07/30/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/17/2026). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Router Operating System

Vendor

• Tenda

Name

• W20E

Version

• 16.01.0.6

License

• commercial

Website

• Vendor: https://www.tenda.com.cn/

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