{"slug":"tplink-archer-ax21-v2-us","display_name":"Archer AX21","model_name":"Archer AX21","hardware_revision":"v2","region_code":"US","category":"router","vendor":{"slug":"tplink","name":"TP-Link"},"verdict":{"status":"slowing","label":"Slowing down","confidence":"high","reason":"377 days since the last release against a median gap of 136 (2.8x)","algorithm_version":"lifecycle-1","computed_at":"2026-09-30T01:14:39.248337+00:00","thresholds":{"quiet_days":730,"active_max_days":365,"active_multiple":1.5,"slowing_multiple":3.0,"max_gap_dispersion":1.0,"high_confidence_releases":5,"min_releases_for_cadence":3,"never_updated_min_age_days":365}},"measurements":{"release_count":9,"first_release_date":"2020-12-16","last_release_date":"2025-09-18","days_since_last_release":377,"median_gap_days":136.0,"cadence_multiple":2.772,"observed_support":{"days":1737,"is_floor":true,"measured_from":"first_release"},"promise":{"end_date":null,"is_estimated":false,"is_floor":false,"honoured":null,"basis":"no_eol_announcement"},"cve_patch_latency_days":{"median":null,"measurable":false}},"releases":[{"version":"Archer AX21(US)_V2_2.1.9 Build 20250424","channel":"stable","claimed_release_date":"2025-09-18","claimed_date_precision":"day","is_vendor_dated":true,"first_observed_at":"2026-08-01T18:37:57.630436+00:00","observation_kind":"live_crawl","withdrawn_at":null,"changelog":"Enhancements 1. 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Enhance device security; 2. Improve the stability of the equipment.","disclosure_score":0.42,"mentions_security":true,"cve_ids":[],"download_url":"https://static.tp-link.com/upload/firmware/2023/202308/20230831/Archer AX21_V2_230829.zip","evidence":{"id":201811,"source_url":"https://www.tp-link.com/us/support/download/archer-ax21/v2/","fetched_at":"2026-09-29T02:09:39.436594+00:00","observed_at":"2026-09-29T02:09:39.436594+00:00","http_status":200,"content_sha256":"90accdfb257c0fcf6ee2d4549c354007e25452731a823cb00ab15b3bc9e7fe1e","html":"//firmwarewatch.cc/evidence/201811","raw":"//firmwarewatch.cc/evidence/201811/raw"}},{"version":"Archer AX21(US)_V2_230426","channel":"stable","claimed_release_date":"2023-04-27","claimed_date_precision":"day","is_vendor_dated":true,"first_observed_at":"2026-08-01T18:37:57.630436+00:00","observation_kind":"live_crawl","withdrawn_at":null,"changelog":"Note: 1. Improved system stability 2. Fixed some security issues","disclosure_score":0.25,"mentions_security":true,"cve_ids":[],"download_url":"https://static.tp-link.com/upload/firmware/2023/202304/20230427/Archer AX21(US)_V2_230426.zip","evidence":{"id":201811,"source_url":"https://www.tp-link.com/us/support/download/archer-ax21/v2/","fetched_at":"2026-09-29T02:09:39.436594+00:00","observed_at":"2026-09-29T02:09:39.436594+00:00","http_status":200,"content_sha256":"90accdfb257c0fcf6ee2d4549c354007e25452731a823cb00ab15b3bc9e7fe1e","html":"//firmwarewatch.cc/evidence/201811","raw":"//firmwarewatch.cc/evidence/201811/raw"}},{"version":"Archer AX21(US)_V2_2.1.7 Build 20221125","channel":"stable","claimed_release_date":"2022-12-02","claimed_date_precision":"day","is_vendor_dated":true,"first_observed_at":"2026-08-13T02:00:00.107884+00:00","observation_kind":"live_crawl","withdrawn_at":null,"changelog":"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.","disclosure_score":0.58,"mentions_security":true,"cve_ids":[],"download_url":"https://static.tp-link.com/upload/firmware/2022/202212/20221202/Archer AX21(US)_V2_221125.zip","evidence":{"id":201811,"source_url":"https://www.tp-link.com/us/support/download/archer-ax21/v2/","fetched_at":"2026-09-29T02:09:39.436594+00:00","observed_at":"2026-09-29T02:09:39.436594+00:00","http_status":200,"content_sha256":"90accdfb257c0fcf6ee2d4549c354007e25452731a823cb00ab15b3bc9e7fe1e","html":"//firmwarewatch.cc/evidence/201811","raw":"//firmwarewatch.cc/evidence/201811/raw"}},{"version":"Archer AX21(US)_V2_211231","channel":"stable","claimed_release_date":"2022-01-28","claimed_date_precision":"day","is_vendor_dated":true,"first_observed_at":"2026-08-25T02:00:00.191624+00:00","observation_kind":"live_crawl","withdrawn_at":null,"changelog":"Enhancement: 1.Improved wired and wireless stability; 2.Maximum wireless devices on single band increased to 128; 3.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.","disclosure_score":0.53,"mentions_security":false,"cve_ids":[],"download_url":"https://static.tp-link.com/upload/firmware/2022/202201/20220128/Archer AX21(US)_V2_211231.zip","evidence":{"id":201811,"source_url":"https://www.tp-link.com/us/support/download/archer-ax21/v2/","fetched_at":"2026-09-29T02:09:39.436594+00:00","observed_at":"2026-09-29T02:09:39.436594+00:00","http_status":200,"content_sha256":"90accdfb257c0fcf6ee2d4549c354007e25452731a823cb00ab15b3bc9e7fe1e","html":"//firmwarewatch.cc/evidence/201811","raw":"//firmwarewatch.cc/evidence/201811/raw"}},{"version":"Archer AX21(US)_V2_210901","channel":"stable","claimed_release_date":"2021-11-05","claimed_date_precision":"day","is_vendor_dated":true,"first_observed_at":"2026-08-25T02:00:00.191624+00:00","observation_kind":"live_crawl","withdrawn_at":null,"changelog":"New Features/Enhancement: 1. Improved the wireless performance; 2. Improved the stability of USB sharing feature; 3. Optimized VPN Client and VPN Server feature; 4. Enhanced the security of HTTPS web page; 5. Updated dropbear version and changed the dropbear port; 6. Updated openssl version; 7. Improved the stability of OneMesh feature. Bug Fixed: 1.Fixed the bugs related to IPTV feature; 2.Fixed the bug that static routing can't set gateway as 0.0.0.0; 3.Fixed the bugs related to AP mode; 4.Fixed the bug that the router can't get WAN IP in some cases; 5.Fixed the bug that WAN pc can get access to the Windows shared folder after disabling DMZ in some cases; 6.Fixed the bugs on the Web UI; 7.Fixed the bugs related to Smart Connect; 8.Fixed the bug related to GDRP encryption.","disclosure_score":0.61,"mentions_security":true,"cve_ids":[],"download_url":"https://static.tp-link.com/upload/firmware/2021/202111/20211105/Archer AX21_V2_210901.zip","evidence":{"id":201811,"source_url":"https://www.tp-link.com/us/support/download/archer-ax21/v2/","fetched_at":"2026-09-29T02:09:39.436594+00:00","observed_at":"2026-09-29T02:09:39.436594+00:00","http_status":200,"content_sha256":"90accdfb257c0fcf6ee2d4549c354007e25452731a823cb00ab15b3bc9e7fe1e","html":"//firmwarewatch.cc/evidence/201811","raw":"//firmwarewatch.cc/evidence/201811/raw"}},{"version":"Archer AX21(US)_V2_210521","channel":"stable","claimed_release_date":"2021-07-14","claimed_date_precision":"day","is_vendor_dated":true,"first_observed_at":"2026-08-25T02:00:00.191624+00:00","observation_kind":"live_crawl","withdrawn_at":null,"changelog":"New Features/Enhancement: 1. Increased the maximum number of black and white lists for the Parent Control feature to 64; 2. Improved the configuration process of Quick Setup; Bug Fixed: 1. Fixed the FragAttacks vulnerabilities; 2. Fixed the PPTP VPN vulnerabilities; 3. Fixed the display bug related to OneMesh; 4. Fixed the bug that PPTP and L2TP client cannot connect to the server in some cases; 5. Fixed the display bug related to the Client Lists in some cases; 6. Fixed the bug that iPhone will be switched from 5GHz to 2.4GHz in some cases;","disclosure_score":0.6,"mentions_security":true,"cve_ids":[],"download_url":"https://static.tp-link.com/firmware/2021/202107/20210714/Archer AX21(US)_V2.0_210521.zip","evidence":{"id":201811,"source_url":"https://www.tp-link.com/us/support/download/archer-ax21/v2/","fetched_at":"2026-09-29T02:09:39.436594+00:00","observed_at":"2026-09-29T02:09:39.436594+00:00","http_status":200,"content_sha256":"90accdfb257c0fcf6ee2d4549c354007e25452731a823cb00ab15b3bc9e7fe1e","html":"//firmwarewatch.cc/evidence/201811","raw":"//firmwarewatch.cc/evidence/201811/raw"}},{"version":"Archer AX21(US)_V2_210325","channel":"stable","claimed_release_date":"2021-06-01","claimed_date_precision":"day","is_vendor_dated":true,"first_observed_at":"2026-08-25T02:00:00.191624+00:00","observation_kind":"live_crawl","withdrawn_at":null,"changelog":"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. Adjusted configuration items and display items on the Tether APP and the web UI; 5. Optimized the Client List; 6. Optimized the Parental Control feature; 7. Optimized coverage of 2.4G network; 8. Optimized compatibility with some ISPs. Bug Fixed: 1. Fixed some bugs that could cause the router to crash or reboot; 2. Fixed the bug that the router incorrectly blocked Internet requests; 3. Fixed the bug that RE300 could not synchronize the wireless schedule setting of the main network; 4. Fixed the bug that some Apps can access USB drive without entering the user and the password; 5. Fixed the bug that the hostname is displayed as a messy code or asterisks; 6. Fixed the bug of failed to save system log in AP mode; 7. Fixed the bug that the router still suggested the client to connect to the 5G network when the 5G network had reached the maximum number of connections after Smart Connect was enabled; 8. Fixed the bug that the LED Control setting is invalid after rebooting the router; 9. Fixed the bug of IP&MAC Binding and Static Route failure after changing IPv6 settings; 10. Fixed the bug that the Clients can not be displayed on Tether APP after the PLC with OneMesh feature is connected to the network.","disclosure_score":0.64,"mentions_security":false,"cve_ids":[],"download_url":"https://static.tp-link.com/2021/202106/20210601/Archer AX21(US)_v2.0_210325.zip","evidence":{"id":201811,"source_url":"https://www.tp-link.com/us/support/download/archer-ax21/v2/","fetched_at":"2026-09-29T02:09:39.436594+00:00","observed_at":"2026-09-29T02:09:39.436594+00:00","http_status":200,"content_sha256":"90accdfb257c0fcf6ee2d4549c354007e25452731a823cb00ab15b3bc9e7fe1e","html":"//firmwarewatch.cc/evidence/201811","raw":"//firmwarewatch.cc/evidence/201811/raw"}},{"version":"Archer AX21(US)_V2_201203","channel":"stable","claimed_release_date":"2020-12-16","claimed_date_precision":"day","is_vendor_dated":true,"first_observed_at":"2026-08-25T02:00:00.191624+00:00","observation_kind":"live_crawl","withdrawn_at":null,"changelog":"First firmware released for Archer AX21(US) V2.0","disclosure_score":0.31,"mentions_security":false,"cve_ids":[],"download_url":"https://static.tp-link.com/2020/202012/20201216/Archer AX21(US)_v2.0_201203.zip","evidence":{"id":201811,"source_url":"https://www.tp-link.com/us/support/download/archer-ax21/v2/","fetched_at":"2026-09-29T02:09:39.436594+00:00","observed_at":"2026-09-29T02:09:39.436594+00:00","http_status":200,"content_sha256":"90accdfb257c0fcf6ee2d4549c354007e25452731a823cb00ab15b3bc9e7fe1e","html":"//firmwarewatch.cc/evidence/201811","raw":"//firmwarewatch.cc/evidence/201811/raw"}}],"identifiers":[{"kind":"marketing_name","value":"Archer AX21","normalized":"archer ax21"}],"revisions":[{"slug":"tplink-archer-ax21-v1-2-us","hardware_revision":"v1.2","region_code":"US"},{"slug":"tplink-archer-ax21-v1-26-us","hardware_revision":"v1.26","region_code":"US"},{"slug":"tplink-archer-ax21-v2","hardware_revision":"v2","region_code":""},{"slug":"tplink-archer-ax21-v2-6-us","hardware_revision":"v2.6","region_code":"US"},{"slug":"tplink-archer-ax21-v3-us","hardware_revision":"v3","region_code":"US"},{"slug":"tplink-archer-ax21-v3-6-us","hardware_revision":"v3.6","region_code":"US"},{"slug":"tplink-archer-ax21-v4","hardware_revision":"v4","region_code":""},{"slug":"tplink-archer-ax21-v4-6-us","hardware_revision":"v4.6","region_code":"US"},{"slug":"tplink-archer-ax21-v5-46-us","hardware_revision":"v5.46","region_code":"US"},{"slug":"tplink-archer-ax21-v5-6-us","hardware_revision":"v5.6","region_code":"US"}],"evidence":{"archived_pages":1,"first_observed_at":"2026-08-01T18:37:57.630436+00:00"},"caveats":["observed_support.days is a lower bound: it runs from the first firmware we saw, because no source here publishes launch dates.","Patch latency is not computable for this product: its changelogs name no CVE ids."],"links":{"html":"//firmwarewatch.cc/devices/tplink-archer-ax21-v2-us","self":"//firmwarewatch.cc/api/v1/products/tplink-archer-ax21-v2-us.json","vendor":"//firmwarewatch.cc/api/v1/vendors/tplink.json","feed":"//firmwarewatch.cc/feeds/devices/tplink-archer-ax21-v2-us.xml","methodology":"//firmwarewatch.cc/api/v1/methodology.json"}}