{"slug":"tplink-archer-c9-v1-us","display_name":"Archer C9","model_name":"Archer C9","hardware_revision":"v1","region_code":"US","category":"router","vendor":{"slug":"tplink","name":"TP-Link"},"verdict":{"status":"quiet","label":"Gone quiet","confidence":"medium","reason":"2141 days since the last release against a median gap of 752 (2.8x) — but 2141 days without firmware is quiet whatever the cadence","algorithm_version":"lifecycle-1","computed_at":"2026-09-30T00:14:42.842425+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":3,"first_release_date":"2016-10-08","last_release_date":"2020-11-19","days_since_last_release":2141,"median_gap_days":751.5,"cadence_multiple":2.849,"observed_support":{"days":1503,"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 C9(US)_V1_210107","channel":"stable","claimed_release_date":"2020-11-19","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":"New Features/Enhancement: Enhance device security. Only for Archer C9(US).","disclosure_score":0.24,"mentions_security":true,"cve_ids":[],"download_url":"https://static.tp-link.com/2021/202101/20210108/archer_c9v1_us-up-ver3-17-1-P1[20210107-rel55552].zip","evidence":{"id":203649,"source_url":"https://www.tp-link.com/us/support/download/archer-c9/v1/","fetched_at":"2026-09-29T03:08:15.448334+00:00","observed_at":"2026-09-29T03:08:15.448334+00:00","http_status":200,"content_sha256":"3792a523d278e536fe2c5d1d12330a824214748290c8dc3f2b300f3e96ad9738","html":"//firmwarewatch.cc/evidence/203649","raw":"//firmwarewatch.cc/evidence/203649/raw"}},{"version":"Archer C9(US)_V1_180125","channel":"stable","claimed_release_date":"2018-02-12","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":"New Features/Enhancement 1.Optimized the IPv6 function 2.Optimized the PPPoE function Bug Fixed 1.Fixed the WPA2 Security (KRACKs) Vulnerability 2.Fixed the bug that the domain name can't be resolved through TCP DNS request Note 1. After upgrading to this firmware, the device cannot be downgraded back to the old version. 2. The router will reset after upgrading this firmware.","disclosure_score":0.52,"mentions_security":true,"cve_ids":[],"download_url":"https://static.tp-link.com/2018/201802/20180212/Archer_C9(US)_v1_180125.zip","evidence":{"id":203649,"source_url":"https://www.tp-link.com/us/support/download/archer-c9/v1/","fetched_at":"2026-09-29T03:08:15.448334+00:00","observed_at":"2026-09-29T03:08:15.448334+00:00","http_status":200,"content_sha256":"3792a523d278e536fe2c5d1d12330a824214748290c8dc3f2b300f3e96ad9738","html":"//firmwarewatch.cc/evidence/203649","raw":"//firmwarewatch.cc/evidence/203649/raw"}},{"version":"Archer C9(US)_V1_161008","channel":"stable","claimed_release_date":"2016-10-08","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":"Modifications and Bug Fixes: New Features/Enhancement： Improved the stability of WIFI transmitting power.","disclosure_score":0.32,"mentions_security":false,"cve_ids":[],"download_url":"https://static.tp-link.com/Archer_C9(US)_V1_161008_1478653422432k.zip","evidence":{"id":203649,"source_url":"https://www.tp-link.com/us/support/download/archer-c9/v1/","fetched_at":"2026-09-29T03:08:15.448334+00:00","observed_at":"2026-09-29T03:08:15.448334+00:00","http_status":200,"content_sha256":"3792a523d278e536fe2c5d1d12330a824214748290c8dc3f2b300f3e96ad9738","html":"//firmwarewatch.cc/evidence/203649","raw":"//firmwarewatch.cc/evidence/203649/raw"}}],"identifiers":[{"kind":"marketing_name","value":"Archer C9","normalized":"archer c9"}],"revisions":[{"slug":"tplink-archer-c9-v3-us","hardware_revision":"v3","region_code":"US"},{"slug":"tplink-archer-c9-v4-us","hardware_revision":"v4","region_code":"US"},{"slug":"tplink-archer-c9-v5-us","hardware_revision":"v5","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-c9-v1-us","self":"//firmwarewatch.cc/api/v1/products/tplink-archer-c9-v1-us.json","vendor":"//firmwarewatch.cc/api/v1/vendors/tplink.json","feed":"//firmwarewatch.cc/feeds/devices/tplink-archer-c9-v1-us.xml","methodology":"//firmwarewatch.cc/api/v1/methodology.json"}}