CVE-2025-8939CWE-119CWE-120

Tenda AC20 WifiGuestSet buffer overflow

High · published August 14, 2025

CVSS v4.0
8.7
EPSS
1%
Percentile
60.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
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
EPSS
0.00942 · 60.6th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2025-08-14T05:32Z
EPSS history
Timeline
  • 14 AUG 05:32Z
    Tenda AC20 WifiGuestSet buffer overflow
    cvelistv5