CVE-2025-8939

Tenda AC20 WifiGuestSet buffer overflow

CVSS 8.7 HIGHEPSS 0.8%CWE-119 CWE-120

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.7EPSS 0.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

14 Aug 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

Tenda · AC20

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20/Tenda%20AC20.md https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20/Tenda%20AC20.md#3-poc https://vuldb.com/?ctiid.319902 https://vuldb.com/?id.319902 https://vuldb.com/?submit.631829 https://www.tenda.com.cn/