Tenda F3/N300 Web-based Administrative Interface cleartext transmission

Summaryinfo

A vulnerability classified as critical was found in Tenda F3 and N300. This issue affects some unknown processing of the component Web-based Administrative Interface. Such manipulation leads to cleartext transmission. This vulnerability is documented as CVE-2026-22079. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Tenda F3 and N300 (version unknown). Affected by this issue is an unknown function of the component Web-based Administrative Interface. The manipulation with an unknown input leads to a cleartext transmission vulnerability. Using CWE to declare the problem leads to CWE-319. The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. Impacted is confidentiality. CVE summarizes:

This vulnerability exists in Tenda wireless routers (300Mbps Wireless Router F3 and N300 Easy Setup Router) due to the plaintext transmission of login credentials during the initial login or post-factory reset setup through the web-based administrative interface. An attacker on the same network could exploit this vulnerability by intercepting network traffic and capturing the credentials transmitted in plaintext. Successful exploitation of this vulnerability could allow the attacker to obtain sensitive information and gain unauthorized access to the targeted device.

The weakness was released by Deven Lunkad, Swaroop Dora, Naziya Aslam and And S. Venkatesan as CIVN-2026-0004. The advisory is shared for download at cert-in.org.in. This vulnerability is handled as CVE-2026-22079 since 01/06/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1040.

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

• F3
• N300

License

• commercial

Website

• Vendor: https://www.tenda.com.cn/

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