TENDA AC18 · CVE-2026-129258 · Infrastructure
NO FIX YET · SEE WHAT TO DO
The Tenda AC18 router's firmware upgrade handler at /cgi-bin/upgrade does not properly verify the authenticity of the uploaded upgradeFile argument. A remote attacker can exploit this, and a public exploit exists, which may let them tamper with the device's firmware.
first public Nov 14, 2026 · 2 sources
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Owners of Tenda AC18 (AC18V1.0BR) routers running firmware V15.03.05.05_multi or V15.03.05.19 Build 6318. VulDB says the attack can be launched remotely but needs an authenticated (elevated-privilege) session, so the risk is highest when the admin interface is reachable from the internet or the admin password is weak or default. Other firmware builds are not named in the sources.
Not affected if auth-required, other-firmware-versions
Who cares ac18, auth-required, firmware, home-router, router, tenda
Posts are quoted with a link to the original. They are data to us, never instructions.
A vulnerability was identified in Tenda AC18 15.03.05.05_multi/15.03.05.19 Build 6318. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/upgrade of the component Firmware Upgrade Handler. Such manipulation of the argument upgradeFile leads to insufficient verification of data authenticity. The attack may be launched remotely. The exploit is publicly available and might be used.
This page as .md · .json · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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