Device Support-Lifespan Observatory

What vendors do, not what they announce.

TP-Link

Archer AX21 v3.6

Gone quiet well evidenced

no firmware for long enough to stand out against its own record

734 days since the last release against a median gap of 98 (7.5x)

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Last firmware
25 September 2024 (2 years ago)
Releases seen
7
Update rhythm
about every 3 months
Support observed
≥2 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.

Firmware history

  1. Archer AX21(US)_V3.6_1.2.1 Build 20240809 25 September 2024

    Release notes — disclosure 0.60 
    New Features/Enhancement: 1. Add the support of the wired backhual on the Easymesh; 2. Add the support of the Tether Easymesh; 3. Add the support of the VPN Client; 4. Add the support of the IoT network; 5. Add the support of the IoT security; 6. Add the button of the flow control; 7. Add the support that getting the configuration from the old router in Quick Setup; 8. Add the support of the Access Control, WPS, TP-Link ID, LED control, wireless schedule and others function on the AP mode; 9. Enhance device security.

    Archived page, fetched 29 September 2026

  2. Archer AX21(US)_V3.6_230621 26 June 2023

    Release notes — disclosure 0.06 
    Modifications and Bug Fixes: Enhance device security.

    Archived page, fetched 29 September 2026

  3. Archer AX21(US)_V3.6_1.1.4 Build 20230219 17 March 2023

    Release notes — disclosure 0.57 
    New Features/Enhancement: 1. Added EasyMesh feature; 2. Added Google Assistant feature; 3. Added Access Time Control and Bandwidth Control feature on Guest Network; 4. Added Advanced Wireless Settings on Tether App; 5. Added Speed Limit feature; 6. Added new time zones into the system time feature; 7. Increase the maximum number of entries for port forwarding to 64; 8. Optimize the client list UI; 9. Optimize the HomeShield feature. Bug Fixed: 1. Fixed some security issues.

    Archived page, fetched 29 September 2026

  4. Archer AX21(US)_V3.6_230219 8 March 2023

    Release notes — disclosure 0.57 
    Modifications and Bug Fixes: 1. Add the EasyMesh function; 2. Add the Access Time Control and Bandwidth Control on the Guest Network; 3. Add the support of the TCP DNS; 4. Add the support of Google Assistant; 5. Add the wireless advanced setting on the Tether; 6. Add the Speed Limit function; 7. The maximum number of entries in Port Forwarding has increased to 64; 8. Improve device security.

    Archived page, fetched 29 September 2026

  5. Archer AX21(US)_V3.6_1.1.3 Build 20221125 2 December 2022

    Release notes — disclosure 0.49 
    New Features/Enhancement: 1. Upgrade the version of the dnsmasq; 2. Enhance device security; 3. Fixed the bug that the TimeMachine does not work under Macos13.1

    Archived page, fetched 29 September 2026

  6. Archer AX21(US)_V3.6_1.1.2 Build 20221016 24 November 2022

    Release notes — disclosure 0.06 
    Improved the stability of the system.

    Archived page, fetched 29 September 2026

  7. Archer AX21(US)_V3.6_1.1.1 Build 20220603 2 August 2022

    Release notes — disclosure 0.48 
    New Features/Enhancement: 1. Added VPN client; 2. Added L2TP/IPsec VPN server; 3. Optimized Online Client List feature under AP mode.

    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