RT-AX5400
No end date
No end date announced yet . estimated end April 2028
Minimum support period for Singapore: the maker promises security updates for products sold in Singapore until at least March 27, 2028. This is a legal minimum for that market, not an end date, and it may not apply to other markets.
Minimum support period for the UK: the maker promises security updates for products sold in the UK until at least December 31, 2026. This is a legal minimum for that market, not an end date, and it may not apply to other markets.
In the EU the maker lists this model as end-of-life (no date given). That listing is for the EU only.
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Dates and sources
Dates and sources
SourceASUS (opens in a new tab)checked October 26, 2026
Key dates
- Release
- By October 2024 at the latestThe maker gives no launch date. This is the month of the first update: the launch was in it or before.
- Last update
- October 20, 2026 · version 3.0.0.4.388_25341
- End of support
- No end date
- Estimated end
- April 2028 · estimateMarked “Likely ended (estimate)” if no update by then
- Minimum support for Singapore
- March 27, 2028 · vendor notice
- Minimum support for the UK
- December 31, 2026 · vendor notice
- Maker’s end-of-life list
- Listed for the EU only, no date given
Firmware updates
Updates I found on the maker’s pages, from October 2024 to October 2026. I read the notes of 12 of these updates and found security changes in 8.
- 3.0.0.4.388_25341 Bug fixes
- 3.0.0.4.388_25340 Security, new features or improvements
- 3.0.0.4.388_25288 Security, new features or improvements
- 3.0.0.4.388_25247 Security
- 3.0.0.4.388_25204 Security, bug fixes, new features or improvements
7 more
- 3.0.0.4.388_25192 Security, bug fixes, new features or improvements
- 3.0.0.4.388_25144 New features or improvements
- 3.0.0.4.388_25142 Security, new features or improvements
- 3.0.0.4.388_25137 Bug fixes
- 3.0.0.4.388_25128 New features or improvements
- 3.0.0.4.388_25127 Security
- 3.0.0.4.388_25119 Security, new features or improvements
Sources
- ASUS (opens in a new tab) End-of-support listlast verified November 13, 2026
- ASUS (opens in a new tab) Firmware downloadslast verified October 26, 2026
- ASUS (opens in a new tab) Security bulletinlast verified October 15, 2026
- ASUS Support page 2026-12-31 (opens in a new tab) Support page 2026-12-31last verified October 14, 2026
- ASUS Support page 2028-03-27 (opens in a new tab) Support page 2028-03-27last verified October 14, 2026
What to do now
- Open the router's admin page or app and install the latest firmware.
- Turn on automatic firmware updates if the router offers them.
- Change the default admin password.
- Turn off remote (WAN) management, WPS and UPnP unless you need them.
- Use WPA2 or WPA3 for Wi-Fi with a long passphrase.
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