RT-AX88U

Key dates

Release

July 2018 · estimate

How I calculated it: ASUS's own Edge Up blog post (dated 2018-06-04, Computex 2018) says this model would arrive in North America in Q3 (2018). ASUS gives no exact on-sale date; the quarter's first month is used as the launch month.

Last update

October 22, 2026 · version 3.0.0.4.388_24386

End of support

April 17, 2026 · calculated by us from the maker’s data

How I calculated it: ASUS’s firmware page for this model says it reached end of life and its firmware will no longer be updated, in the notes of firmware 3.0.0.4.388_24385. ASUS gives no separate date, so we use that firmware’s release date (2026-04-17).

Maker’s end-of-life list

Listed, no date given

Firmware updates

Updates I found on the maker’s pages, from July 2023 to October 2026. I read the notes of 11 of these updates and found security changes in 8.

2026-10-22

3.0.0.4.388_24386 Bug fixes

2026-04-17

3.0.0.4.388_24385 Security

2025-10-20

3.0.0.4.388_24346 Security, bug fixes, new features or improvements

2025-09-01

3.0.0.4.388_24333 Security, bug fixes, new features or improvements

2025-04-22

3.0.0.4.388_24284 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 (Edge Up blog) (opens in a new tab) Support pagelast verified October 25, 2026
• ASUS (opens in a new tab) Security bulletinlast verified October 15, 2026
• Vulnerability data: vendor security bulletins, CISA Known Exploited Vulnerabilities catalog, NVD, FIRST EPSSas of November 13, 2026 · Data sources