CVE-2025-9791CWE-119CWE-121CWE-787

CVE-2025-9791

High · published September 1, 2025

CVSS v3.1
8.8
EPSS
1%
Percentile
58.0
In the wild
Unconfirmed
What it is

A weakness has been identified in Tenda AC20 16.03.08.05. This vulnerability affects unknown code of the file /goform/fromAdvSetMacMtuWan. This manipulation of the argument wanMTU causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be exploited.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00855 · 58.0th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow; CWE-787 · Out-of-bounds Write
Published
2025-09-01T23:15Z
Affected products (1)
ProductVersionsFixed in
tenda/ac20_firmwareall versions—
References (8)
https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md · [email protected]https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#poc · [email protected]https://vuldb.com/?ctiid.322106 · [email protected]https://vuldb.com/?id.322106 · [email protected]https://vuldb.com/?submit.641088 · [email protected]https://www.tenda.com.cn/ · [email protected]https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md · 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#poc · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 01 SEP 19:02Z
    Tenda AC20 fromAdvSetMacMtuWan stack-based overflow
    cvelistv5