Yes, but that’s not “official” firmware. OpenWrt supports the Archer C5 v4 (based on the MediaTek MT7621 chipset). However, you lose hardware NAT acceleration – meaning your gigabit ports will max out at ~300Mbps. For most users, the latest TP-Link firmware is better.
18 Mar 2026 — Method 2: Local upgrade via web management page * Download firmware that matches your Router's model and hardware version from TP- www.tp-link.com Download for Archer C5 V4 - TP-Link tplink archer c5 v4 latest firmware download exclusive