Deviceways

Router

TP-LINK TL-MR3420

Contribute

Projects for this device

Replacement firmware

Hardwarev1 / v1.1 / v1.2 / v1.3 · Atheros AR9287 Wi-Fi

v1 / v1.1 / v1.2 / v1.3 · Atheros AR9287 Wi-Fi
Beta build · 10-13-2026-r66345
Browse firmware downloadsdownload1.dd-wrt.com
Replacement firmware

Replace router software with a customizable system for network controls and community packages.

How to get started

Follow the guide for your exact router version. The first installation may use its web interface, recovery mode or a serial connection.

Setup
Firmware replacement; route varies by router
You’ll need
Exact hardware revision, an appropriate OpenWrt release and its model-specific installation guide.
v1 · Atheros AR9287 Wi-Fi
Processor: Atheros AR7241Open hardware record
v3 · Qualcomm Atheros QCA9531 Wi-Fi
Retired support documentedFlash: 4 MB · Memory: 32 MBOpen device guide
v5 · MediaTek MT7628N Wi-Fi
Flash: 8 MB · Memory: 64 MBGet OpenWrt firmware Release listed · 25.12.6
v1 / v1.1 / v1.2 / v1.3 · Atheros AR9287 Wi-Fi; v2 / v2.1 / v2.2 / v2.3 / v2.4 · Atheros AR9341 Wi-Fi
Retired support documentedOpen device guide
v1,v1.1,v1.2,v1.3 · Atheros AR7241
Open hardware record
v2,v2.1,v2.2,v2.3,v2.4 · Atheros AR9341; Atheros AR9341 · Spansion S25FL032PIF
Open hardware record
v3 · Qualcomm Atheros QCA9531
Open hardware record
v5 · MediaTek MT7628N
Open hardware record Release listed · 25.12.5
Original project github.com

v1 / v1.1 / v1.2 / v1.3 · Atheros AR9287 Wi-Fi

Device support in source
Retired; check the documented hardware and older release resources.
First installation
GUI OEM; U-Boot TFTP + serial recovery

v2 / v2.1 / v2.2 / v2.3 / v2.4 · Atheros AR9341 Wi-Fi

Device support in source
Retired; check the documented hardware and older release resources.
First installation
GUI OEM; U-Boot TFTP + serial recovery

v3 · Qualcomm Atheros QCA9531 Wi-Fi

Device support in source
Retired; check the documented hardware and older release resources.
Limitations
WiFi 5GHz
First installation
GUI OEM

v5 · MediaTek MT7628N Wi-Fi

First installation
U-Boot TFTP recovery
Sources

Features & details

Check the project and hardware shown for each feature.

Device details

tp-link tl-mr3420 v1 — device documentation (github.com)

Hardware revision
v1,v1.1,v1.2,v1.3

Device details

tp-link tl-mr3420 v2 — device documentation (github.com)

Hardware revision
v2,v2.1,v2.2,v2.3,v2.4

Device details

tp-link tl-mr3420 v3 — device documentation (github.com)TP-LINK TL-MR3420 v3 — TechInfoDepot (github.com)

Hardware revision
v3

Device details

tp-link tl-mr3420 v5 — device documentation (github.com)TP-LINK TL-MR3420 v5 — TechInfoDepot (github.com)

Hardware revision
v5

Device details

TP-LINK TL-MR3420 v1 — TechInfoDepot (github.com)

Hardware revision
v1

Device details

TP-LINK TL-MR3420 v1 — WikiDevi (github.com)

Hardware revision
v1

Device details

TP-LINK TL-MR3420 v2 — WikiDevi (github.com)

Hardware revision
v2

Device details

Device details — Source documentation (openwrt.org)

Hardware revision
v1 / v1.1 / v1.2 / v1.3

OpenWrt · v1 / v1.1 / v1.2 / v1.3 · Atheros AR9287 Wi-Fi

OpenWrt · v1 / v1.1 / v1.2 / v1.3 · Atheros AR9287 Wi-Fi — Source documentation (openwrt.org)

Installation routes recorded
GUI OEM, U-Boot TFTP + serial recovery
Recovery routes recorded
U-Boot TFTP + serial recovery
Availability recorded by source
Discontinued

Device details

Device details — Source documentation (openwrt.org)

Hardware revision
v2 / v2.1 / v2.2 / v2.3 / v2.4

OpenWrt · v2 / v2.1 / v2.2 / v2.3 / v2.4 · Atheros AR9341 Wi-Fi

OpenWrt · v2 / v2.1 / v2.2 / v2.3 / v2.4 · Atheros AR9341 Wi-Fi — Source documentation (openwrt.org)

Installation routes recorded
GUI OEM, U-Boot TFTP + serial recovery
Recovery routes recorded
U-Boot TFTP + serial recovery
Availability recorded by source
Discontinued

Device details

Device details — Source documentation (openwrt.org)

Hardware revision
v3

OpenWrt · v3 · Qualcomm Atheros QCA9531 Wi-Fi

OpenWrt · v3 · Qualcomm Atheros QCA9531 Wi-Fi — Source documentation (openwrt.org)

Installation routes recorded
GUI OEM
Recovery routes recorded
TP-Link TFTP
Availability recorded by source
Discontinued

Device details

Device details — v5 — Source documentation (openwrt.org)

Hardware revision
v5

OpenWrt · v5 · MediaTek MT7628N Wi-Fi

OpenWrt · v5 · MediaTek MT7628N Wi-Fi — v5 — Source documentation (openwrt.org)

Installation routes recorded
U-Boot TFTP recovery
Recovery routes recorded
U-Boot TFTP recovery
Availability recorded by source
Available 2019

Hardware differences

Technical references

Security

Saved scan

From our saved security research.

Model advisories

Selected highlights

Prioritized by known exploitation, severity, then date.

CVE published

Listed in CISA KEV ↗CVSS 6.5 (v3.1)

TL-MR3420

TP-Link TL-WR841N dropbearpwd Improper Authentication Information Disclosure Vulnerability

CVE-2023-50224

Affected firmware
V2 V3 V4
Fix
Fix details in the linked record
Read zdi CVE record
Details and sources
Public disclosure CVE updated

TP-Link TL-WR841N dropbearpwd Improper Authentication Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of TP-Link TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from improper authentication. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-19899.

ZDI-23-1808 — TL-MR3420 (zerodayinitiative.com) ↗vendor-provided URL — TL-MR3420 (tp-link.com) ↗vendor-advisory — TL-MR3420 (tp-link.com) ↗
Check more security advisories for this device · CVE.org