CVE-2025-8939 HIGH

CVE-2025-8939: Tenda AC20 WifiGuestSet buffer overflow

Vendor Tenda
Product AC20
Weakness CWE-120
Published August 14, 2025
Last update August 15, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A vulnerability was determined in Tenda AC20 up to 16.03.08.12. Affected is an unknown function of the file /goform/WifiGuestSet. The manipulation of the argument shareSpeed leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Key dates

02Disclosure timeline

August 14, 2025 CVE published
August 15, 2025 Record updated