Buffalo WHR-1166D OpenWrt Firmware

CPU: MediaTek MT7620A
RAM: 128 MB
Flash: 16 MB

The Buffalo WHR-1166D is supported by OpenWrt on the ramips/mt7620 target. 2 firmware images are available from the official OpenWrt 25.12.5 stable release — download one below, or build a custom OpenWrt image for this device with your own package selection.

Specs

Specifications

CPU	MediaTek MT7620A
CPU cores	1
CPU frequency	580 MHz
RAM	128 MB
Flash	16 MB
100 Mbit Ethernet ports	4
1 Gbit Ethernet ports	1
WLAN hardware	MediaTek MT7620A, MediaTek MT7612E
Switch	MediaTek MT7620A

Hardware data from the OpenWrt Table of Hardware; verify against your unit before flashing.

Build matrix

Supported firmware versions

Distribution	Version	Target	Profile
OpenWrt	25.12.5	ramips/mt7620	buffalo_whr-1166d

Downloads

Download images

OpenWrt 25.12.5 · ramips/mt7620

Image	Type	sha256
openwrt-25.12.5-ramips-mt7620-buffalo_whr-1166d-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery.	kernel	c27c029e7729…
openwrt-25.12.5-ramips-mt7620-buffalo_whr-1166d-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt.	sysupgrade	0491c71cfad8…

Downloads are served by the official OpenWrt mirrors — unchanged upstream stable builds.

Packages & install

Default packages & installation

Default packages

Every image for the Buffalo WHR-1166D ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.

Device packages (1)

kmod-mt76x2

Target default packages (29)

apk-mbedtls base-files ca-bundle dnsmasq dropbear firewall4 fstools kmod-gpio-button-hotplug kmod-leds-gpio kmod-nft-offload kmod-rt2800-soc libc libgcc libustream-mbedtls logd mtd netifd nftables odhcp6c odhcpd-ipv6only ppp ppp-mod-pppoe procd-ujail swconfig uci uclient-fetch urandom-seed urngd wpad-basic-mbedtls

Installation notes

Already running OpenWrt or ImmortalWrt: flash the sysupgrade image from LuCI (System → Backup / Flash Firmware) or with the sysupgrade command.
The kernel / initramfs image boots from RAM without writing to flash — useful for a first install or for recovering from a failed flash.

Verify your download against the published checksum before flashing:

$ sha256sum openwrt-25.12.5-ramips-mt7620-buffalo_whr-1166d-initramfs-kernel.bin
c27c029e772921acb57c8746ad1ab353dd1cd4c7ba5df61d2f753c723b7f47ca  openwrt-25.12.5-ramips-mt7620-buffalo_whr-1166d-initramfs-kernel.bin

Build custom firmware

Need more than the default image for the Buffalo WHR-1166D? Pick your packages — LuCI apps, themes, VPN clients — set the basics, and get a ready-to-flash OpenWrt image assembled from official packages in minutes.

Customize firmware for this device

More Buffalo devices

More devices on ramips/mt7620

Upstream

Upstream & source

Images are assembled from packages compiled and published by the upstream OpenWrt and ImmortalWrt projects. The complete corresponding source code is available from those projects under the GPL.