Archer AX21 v1.2

Slowing down well evidenced

updates are coming less often than this product's own history

377 days since the last release against a median gap of 126 (3.0x)

Last firmware: 17 September 2025 (1 year ago)
Releases seen: 12
Update rhythm: about every 4 months
Support observed: ≥5 years
Vendor's promise: no support period we can evaluate
Patch latency: not measurable — its changelogs name no CVE ids

Which one do I have?

TP-Link ships this model in more than one hardware revision, and they do not share firmware. The revision is printed on the label on the underside, usually after the model — Ver 1.0, V4.6. Getting it wrong is the easiest way to read the wrong answer here.

Archer AX21 v1.26 (US) Gone quiet 2 releases
Archer AX21 v2 Gone quiet 1 releases
Archer AX21 v2 (US) Slowing down 9 releases
Archer AX21 v2.6 (US) Slowing down 5 releases
Archer AX21 v3 (US) Gone quiet 8 releases
Archer AX21 v3.6 (US) Gone quiet 7 releases
Archer AX21 v4 Not enough evidence 0 releases
Archer AX21 v4.6 (US) Slowing down 5 releases
Archer AX21 v5.46 (US) Not enough evidence 1 releases
Archer AX21 v5.6 (US) Gone quiet 3 releases

Firmware history

Archer AX21(US)_V1.20_1.3.8 Build 20250424 17 September 2025
Release notes — disclosure 0.11
```
Enhancements 1. Improved overall security and stability.
```
Archived page, fetched 29 September 2026

Archer AX21(US)_V1.20_1.3.7 Build 20230829 31 August 2023

Release notes — disclosure 0.42

This update is recommended for all users and provides important security updates Modifications and Bug Fixes 1. Enhance device security; 2. Improve the stability of the equipment.

Archived page, fetched 29 September 2026

Archer AX21(US)_V1.20_230426 27 April 2023
Release notes — disclosure 0.25
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Note: 1. Improved system stability 2. Fixed some security issues
```
Archived page, fetched 29 September 2026

Archer AX21(US)_V1.2_1.3.6 Build 20221125 2 December 2022

Release notes — disclosure 0.58

New Features/Enhancement: 1. Enhance device security; 2. Fixed the bug that if you manually configure DNS for IPv4 in PPPoE co-session scenarios, the ISP DNS is still configured for domain name resolution; 3. Fixed the bug that the RA configuration does not take effect correctly in specific cases during IPv6; 4. Fixed the bug that when enabling PPPoEV6, the field carried by PPPoE dial-up does not contain the service name; 5. Fixed the bug that the TimeMachine does not work under Macos13.1.

Archived page, fetched 29 September 2026

Archer AX21(US)_V1.2_221103 17 November 2022
Release notes — disclosure 0.06
```
Modifications and Bug Fixes: Enhance device security.
```
Archived page, fetched 29 September 2026

Archer AX21(US)_V1.2_211231 28 January 2022

Release notes — disclosure 0.54

Enhancement: 1.Improved wired and wireless stability; 2.Maximum wireless devices on single band increased to 128; 3.Optimized IPv6 feature; 4.Updated dnsmasq version. Bug Fixed: 1.Fixed the bug that the router has unstable Internet connection in some cases; 2.Fixed the bugs on the Web UI; 3.Fixed the bug that parent control will take affect one hour earlier after the end of daylight saving time.

Archived page, fetched 29 September 2026

Archer AX21(US)_V1.2_210901 22 November 2021

Release notes — disclosure 0.63

New Features/Enhancement: 1. Improved the performance of the wireless network; 2. Improved the static routing feature; 3. Modified the default hostname of the dynamic IP connection. Bug Fixed: 1. Updated the version of the Dropbear and fixed some Dropbear vulnerabilities; 2. Updated the version of the OpenSSL and fixed some OpenSSL vulnerabilities; 3. Fixed some web UI errors; 4. Fixed the bug that the result of the HomeShield traffic statistic feature is incorrect; 5. Fixed the bug that the router sometimes couldn't recognize exFAT format USB disk correctly; 6. Fixed the bug that sometimes the number of the client list is incorrect when the router works as the AP mode; 7. Fixed the bug that the DNS server will be cleared after the router restarts when the router works as the AP mode; 8. Fixed some issues that the OpenVPN client feature doesn't work normally.

Archived page, fetched 29 September 2026

Archer AX21(US)_V1.2_210521 15 June 2021

Release notes — disclosure 0.63

New Features/Enhancement: 1. Optimized the Parental Control feature; 2. Optimized the Client List on Tether App; 3. Optimized some display items on Web UI; 4. Optimized the Quick Setup. Bug Fixed: 1. Fixed the FragAttacks vulnerabilities; 2. Fixed the bug that iPhone may be asked to connect to 2.4G network when Smart Connect is enabled; 3. Fixed the bug that the PPTP/L2TP VPN clients cannot connect to the server successfully when the username or password contains ' and # characters; 4. Fixed the bug that some Apps can access USB drive without entering the user and password; 5. Fixed the bug that the hostname is displayed as a messy code or asterisks.

Archived page, fetched 29 September 2026

Archer AX21(US)_V1.2_210304 12 April 2021

Release notes — disclosure 0.64

New Features/Enhancement: 1. Added VPN Client and VPN Server feature; 2. Added QoS Schedule feature; 3. Added a prompt when the negotiation rate of WAN port is 100Mbps; 4. Added the feature of displaying the time length of Internet connection; 5. Added Feedback Option; 6. Added configuration items and display items on Tether APP; 7. Optimized the Parental Control feature; 8. Optimized the Client List; 9. Optimized coverage of 2.4G network; 10. Moved the language setting of the Web UI to the login page; 11. The wireless default encryption method is modified to WPA2+AES. Bug Fixed: 1. Fixed the bug that Web UI cannot synchronize the operation of deleting UPNP entries; 2. Fixed the bug that the Clients can not be displayed on Tether APP after the PLC with OneMesh feature is connected to the network; 3. Fixed the bug that the LED Control setting is invalid after rebooting the router; 4. Fixed the bug that Alexa fails to upload client information; 5. Fixed some bugs that could cause the router to crash or reboot; 6. Fixed the bug that the router incorrectly blocked Internet requests; 7. Fixed the bug of failed to save system log in AP mode; 8. Fixed the bug that the USB capacity was displayed incorrectly.

Archived page, fetched 29 September 2026

Archer AX21(US)_V1.2_201202 22 December 2020

Release notes — disclosure 0.50

New Features/Enhancement: 1. Added Amazon Frustration-Free Setup; 2. Optimized the latency of Alexa Smart Home API. Bug Fixed: 1. Fixed the bug that keywords cannot be added to the filter content in the parental control profile.

Archived page, fetched 29 September 2026

Archer AX21(US)_V1.2_201118 3 December 2020
Release notes — disclosure 0.30
```
Released
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Archived page, fetched 29 September 2026
Archer AX21(US)_V1.2_200518 12 June 2020
Release notes — disclosure 0.31
```
First firmware released for Archer AX21(US) V1.20
```
Archived page, fetched 29 September 2026

Evidence

One archived page sits behind this record, the earliest read on 1 August 2026. Everything above was read from it, and each is kept byte for byte so it can be checked after the vendor edits the original.

Identifiers: marketing_name Archer AX21

Judged by lifecycle-1 on 29 September 2026. How these verdicts are computed.

Machine-readable: JSON · RSS