CVE-2025-8939

Tenda AC20 WifiGuestSet buffer overflow

State: Published
Severity: 8.7 High
Published: Aug 14, 2025
Updated: Aug 15, 2025
Reserved: Aug 13, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	VulDB
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
3.0	8.8 High	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-120 Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
AC20Tenda	16.03.08.0Affected 16.03.08.1Affected 16.03.08.2Affected 16.03.08.3Affected 16.03.08.4Affected 16.03.08.5Affected 16.03.08.6Affected 16.03.08.7Affected 16.03.08.8Affected 16.03.08.9Affected 16.03.08.10Affected 16.03.08.11Affected 16.03.08.12Affected

References

VDB-319902 | Tenda AC20 WifiGuestSet buffer overflowvdb-entrytechnical-description
VDB-319902 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #631829 | Tenda AC20 ≤ V16.03.08.12 (latest version) Buffer Overflowthird-party-advisory
https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20/Tenda%20AC20.mdrelated
https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20/Tenda%20AC20.md#3-pocexploit
https://www.tenda.com.cn/product

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