CVE-2025-5839: high-severity vulnerability in Tenda AC9
Tenda AC9 POST Request AdvSetLanip fromadvsetlanip buffer overflow
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 1.1%
A vulnerability, which was classified as critical, has been found in Tenda AC9 15.03.02.13. Affected by this issue is the function fromadvsetlanip of the file /goform/AdvSetLanip of the component POST Request Handler. The manipulation of the argument lanMask leads to buffer overflow. The attack may be launched 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 · AC9Related CVEs — Tenda AC9
In the same product, most dangerous first.
CVE-2025-10442MEDIUMTenda AC9/AC15 exeCommand formexeCommand os command injectionEPSS 9.2%CVE-2025-10443HIGHTenda AC9/AC15 exeCommand formexeCommand buffer overflowEPSS 4.6%CVE-2025-5836MEDIUMTenda AC9 POST Request SetIPTVCfg formSetIptv command injectionEPSS 2.9%CVE-2025-5847HIGHTenda AC9 HTTP POST Request SetRemoteWebCfg formSetSafeWanWebMan stack-based overflowEPSS 1.1%CVE-2026-86300MEDIUMTenda AC9 Web Management R7WebsSecurityHandler improper authenticationEPSS 0.8%CVE-2026-6016HIGHTenda AC9 POST Request WizardHandle decodePwd stack-based overflowEPSS 0.8%