Archer C20 v4
Slowing down reasonably evidenced
updates are coming less often than this product's own history
616 days since the last release against a median gap of 1445 (0.4x) — but a year without firmware is not active whatever the cadence
- Last firmware
- 21 January 2025 (2 years ago)
- Releases seen
- 3
- Update rhythm
- about every 4 years
- Support observed
- ≥8 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 C20 v1 Not enough evidence 0 releases
- Archer C20 v5 (US) Actively updated 8 releases
- Archer C20 v5.6 (CPI) Not enough evidence 1 releases
- Archer C20 v5.6 (US) Slowing down 3 releases
- Archer C20 v5.8 (US) Slowing down 3 releases
- Archer C20 v6.46 (CPI) Actively updated 3 releases
- Archer C20 v6.6 (CPI) Actively updated 3 releases
Firmware history
-
Archer C20(US)_V4_250117 21 January 2025
Release notes — disclosure 0.30
Enhance device security.
Archived page, fetched 29 September 2026
-
Archer C20(US)_V4_190103 20 February 2019
Release notes — disclosure 0.60
Modifications and Bug Fixes New Features/Enhancement: 1. Add AP mode. 2. Add LED Schedule function. 3. Add Reboot Schedule function. 4. Add display of port status. 5. Add the support for https. 6. Optimize PPPoE function. 7. Optimize NTP function. 8. Optimize IPv6 function. 9. Improve the stability of device. Bug fixes: 1. Fix the issue that L2TP connection is unstable in some scenarios. 2. Fix the CSRF/XSRF vulnerability. Notes 1. For Archer C20(US) V4. 2. The current settings will be lost after upgrading to this firmware and the old backup file cannot be imported directly. Please reconfigure the router manually.
Archived page, fetched 29 September 2026
-
Archer C20(US)_V4_170222 22 February 2017
Release notes — disclosure 0.06
Modifications and Bug Fixes: First Firmware Released.
Archived page, fetched 29 September 2026
Evidence
2 archived pages sit behind this record, the earliest read on 1 August 2026. Everything above was read from them, and each is kept byte for byte so it can be checked after the vendor edits the original.
Identifiers: marketing_name Archer C20 · openwrt_id tplink_archer-c20-v4
Judged by lifecycle-1 on 29 September 2026.
How these verdicts are computed.