Device Support-Lifespan Observatory

What vendors do, not what they announce.

TP-Link

Archer C5400X v1

End of support well evidenced

the vendor has said support is over

the vendor has declared end of support for this product

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Last firmware
30 September 2025 (12 months ago)
Releases seen
9
Update rhythm
about every 6 months
Support observed
≥7 years
Vendor's promise
4 December 2025
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.

Firmware history

  1. Archer C5400X(US)_V1_1.2.1 Build 20250928 30 September 2025

    Release notes — disclosure 0.52 
    New Features/Enhancement: 1. Supported more parental control functions, including SafeSearch, YouTube Restricted, APP Time Limits, Always Allowed APPs, Offtime, etc. 2. Enhanced Web Filter, enriched visited/block history and optimized Blocked APPs for parental control. 3. Optimized QoS. 4. Enhanced security of device.

    Archived page, fetched 29 September 2026

  2. Archer C5400X(US)_V1_240924 20 May 2025

    Release notes — disclosure 0.06 
    Modifications and Bug Fixes: Enhance device security.

    Archived page, fetched 29 September 2026

  3. Archer C5400X(US)_V1_1.1.7 Build 20240510 24 May 2024

    Release notes — disclosure 0.06 
    Note: Enhanced system security and stability.

    Archived page, fetched 29 September 2026

  4. Archer C5400X(US)_V1_1.1.6 Build 20231010 1 November 2023

    Release notes — disclosure 0.32 
    Modifications: Fixed a display bug when accessing the web UI on mobile devices.

    Archived page, fetched 29 September 2026

  5. Archer C5400X(US)_V1_1.1.5 Build 20230906 15 September 2023

    Release notes — disclosure 0.31 
    Fixed the bug that parental control doesn't take effect.

    Archived page, fetched 29 September 2026

  6. Archer C5400X(US)_V1_1.1.4 Build 20230801 31 August 2023

    Release notes — disclosure 0.43 
    This update is recommended for all users and provides important security updates. Modifications and Bug Fixes 1. Enhance device security; 2. Improve the stability of the equipment.

    Archived page, fetched 29 September 2026

  7. Archer C5400X(US)_V1_191223 14 January 2020

    Cites CVE-2017-14491

    Release notes — disclosure 0.98 
    New Features/Enhancements: 1. Improved the stability and performance of the device; 2. Optimized the compatibility with some browsers; 3. Newly add support of GeForce Now. Bug Fixed: 1. Fixed the bug that MAC clone will turn the PC to no internet in special cases; 2. Fixed the bug that sometimes MAC address will turn to other one; 3. Fixed the bug that office file can't be saved in the Samba Sharing Folder; 4. Fixed the bug that OpenVPN server won't work after reboot in special cases; 5. Fixed the CVE-2017-14491 DNS heap buffer overflow problem; 6. Fixed the bug that Homecare function will has impact on performance in special scenario; 7. Fixed the bug that portal will still jumping out after verifying in the guest network.

    Archived page, fetched 29 September 2026

  8. Archer C5400X(US)_V1_180904 25 September 2018

    Release notes — disclosure 0.45 
    New Features/Enhancements: 1.Added Alexa& IFTTT tutorial pages. 2.Improved Wireless Schedule function performance. 3.Improved Daylight saving time function performance. 4.Improved Smart connect performance. 5.Improved the stability of AP mode. 6.Improved the router's performance in IPv6. 7.Improved the accuracy of language on the webpage. 8.Improved Phone UI performance. Bug Fixes 1.Fixed the bug that NAT forwarding will fail in some situation. 2.Fixed the bug that DHCP Reservation with special characters not working properly. 3.Fixed the bug that DHCP renew packet will be block in some filtering rules.

    Archived page, fetched 29 September 2026

  9. Archer C5400X(US)_V1_180327 11 May 2018

    Release notes — disclosure 0.30 
    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 C5400X

Judged by lifecycle-1 on 29 September 2026. How these verdicts are computed.

Machine-readable: JSON · RSS