Tenda AC6 15.03.06.23 saveParentControlInfo deviceName stack-based overflow

Summaryinfo

A vulnerability was found in Tenda AC6 15.03.06.23. It has been rated as critical. Affected is the function saveParentControlInfo. This manipulation of the argument deviceName causes stack-based overflow. This vulnerability appears as CVE-2025-55503. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Tenda AC6 15.03.06.23. It has been declared as critical. Affected by this vulnerability is the function saveParentControlInfo. The manipulation of the argument deviceName with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Tenda AC6 V15.03.06.23_multi has a stack overflow vulnerability via the deviceName parameter in the saveParentControlInfo function.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-55503 since 08/13/2025. The exploitation appears to be easy. The attack can be launched remotely. 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 08/20/2025).

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

• AC6

Version

• 15.03.06.23

License

• commercial

Website

• Vendor: https://www.tenda.com.cn/

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Duplicate

• Submit #XXXXXX: Xxxxx Xxx Xx.x Xx.xx.xx.xx Xxxxx-xxxxx Xxxxxx Xxxxxxxx (by z472421519)
• Submit #XXXXXX: Xxxxx Xxxxx.x Xxxxx Xxxxx.x Xxx.xx.xx.xx_xxxxx Xxxxx-xxxxx Xxxxxx Xxxxxxxx (by Haaalion)

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