Device Support-Lifespan Observatory

What vendors do, not what they announce.

TP-Link

Deco M9 Plus v1

Slowing down well evidenced

updates are coming less often than this product's own history

369 days since the last release against a median gap of 128 (2.9x)

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Last firmware
25 September 2025 (1 year ago)
Releases seen
16
Update rhythm
about every 4 months
Support observed
≥7 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.

Firmware history

  1. Deco M9 Plus(US)_V1_1.7.1 Build 20250905 25 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. Enhanced security functions of device. 4. Optimized QoS.

    Archived page, fetched 29 September 2026

  2. Deco M9 Plus(US)_V1_1.6.4 Build 20240719 20 August 2024

    Release notes — disclosure 0.28 
    New Features/Enhancements: 1. Fixed several security vulnerabilities. 2. Improved system stability.

    Archived page, fetched 29 September 2026

  3. Deco M9 Plus(US)_V1_1.6.3 Build 20231225 31 January 2024

    Release notes — disclosure 0.35 
    Bug Fixes: 1. Fix the potential security vulnerability and its related problem. 2. Improve system stability and security.

    Archived page, fetched 29 September 2026

  4. Deco M9 Plus(US)_V1_1.6.2 Build 20230906 25 September 2023

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

    Archived page, fetched 29 September 2026

  5. Deco M9 Plus(US)_V1_1.6.1 Build 20230403 5 May 2023

    Release notes — disclosure 0.41 
    New Features/Enhancements: 1. Optimized the icon of the clients. 2. Improved system stability. Bug fixes: 1. Fixed the bug that the built-in speedtest has low speed test results.

    Archived page, fetched 29 September 2026

  6. Deco M9 Plus(US)_V1_1.5.1_210126 20 February 2021

    Release notes — disclosure 0.36 
    Modifications and Bug Fixes: 1. Fixed the problem that Zoom applications are banned by the Pay-to-Surf category under Parental Control. 2. Improved compatibility and stability.

    Archived page, fetched 29 September 2026

  7. Deco M9 Plus(US)_V1_200918 9 October 2020

    Release notes — disclosure 0.43 
    Modifications and Bug Fixes: 1. Fixed the Wi-Fi encryption type as WPA2-PSK [AES] to ensure the security of the Wi-Fi connection. 2. Added the option to change the Wi-Fi encryption type.

    Archived page, fetched 29 September 2026

  8. Deco M9 Plus(US)_V1_1.4.2_200821 11 September 2020

    Release notes — disclosure 0.06 
    Modifications and Bug fixes: Improved security.

    Archived page, fetched 29 September 2026

  9. Deco M9 Plus(US)_V1_200324 8 June 2020

    Release notes — disclosure 0.57 
    Modifications and Bug Fixes: 1. Added switch for the UPnP function. 2. Added isolation switch for main network and guest network in Access Point mode. 3. Supported Alexa native skill. 4. Disabled ping on WAN port to get rid of security risks. 5. TP-Link smart devices can be automatically added as smart devices after being connected to the Deco network now. 6. Improved system security and reliability. 7. Supported Zigbee device Muller.

    Archived page, fetched 29 September 2026

  10. Deco M9 Plus(US)_V1_190821 24 October 2019

    Release notes — disclosure 0.55 
    Modifications and Bug Fixes: 1. Added support for IPTV bridge mode and custom mode. 2. Added IPv6 firewall rules feature. 3. Added Mesh Technology option. 4. Displayed which client is connected to which deco and which Wi-Fi band. 5. Displayed how Decos are connected to each other. 6. Supported up to 64 entries each for Address Reservation and Port Forwarding. 7. Improved the system stability and fixed some bugs.

    Archived page, fetched 29 September 2026

  11. Deco M9 Plus(US)_V1_190403 18 April 2019

    Release notes — disclosure 0.34 
    Modifications and Bug Fixes: 1. Enhanced system security. 2. Improved total performance.

    Archived page, fetched 29 September 2026

  12. Deco M9 Plus(US)_V1_190308 2 April 2019

    Release notes — disclosure 0.54 
    Modifications and Bug fixes: 1. Please update your Deco App to latest version in order to use new features. 2. Added swicth buttons for SIP ALG and beamforming. 3. Added support of MAC Clone. 4. Added support for IPTV. 5. Added Privilege options for manager accounts. 6. Optimized the QoS settings and Speed Test. 7. Improved the networking stability.

    Archived page, fetched 29 September 2026

  13. Deco M9 Plus(US)_V1_181206 26 December 2018

    Release notes — disclosure 0.57 
    Modifications and Bug Fixes: 1. Added custom configuration options for LAN IP and DHCP server. 2. Modified the subnet as 192.168.68.0/24 to avoid potential conflicts. You can customize the subnet by changing DHCP server settings. 3. Added WPS function. 4. Added support for PPTP and L2TP internet connection types. 5. Added individual switches for 2.4 GHz and 5 GHz Wi-Fi networks. 6. Added support of guest network in AP mode or Ethernet backhaul.

    Archived page, fetched 29 September 2026

  14. Deco M9 Plus(US)_V1_180818 29 August 2018

    Release notes — disclosure 0.47 
    Modifications and Bug Fixes: 1. Optimized firmware upgrade experience. 2. Improved the IoT funtion. 3. Improved system stability. 4. Fixed the compatibility issue with some wireless client devices.

    Archived page, fetched 29 September 2026

  15. Deco M9 Plus(US)_V1_180711 16 July 2018

    Release notes — disclosure 0.49 
    Modifications and Bug Fixes: 1. Please update your Deco app to the latest version before the firmware upgrade. 2. Optimized the IoT function. 3. Improved system stability. 4. Added support for working with Deco M5 and Deco P7.

    Archived page, fetched 29 September 2026

  16. Deco M9 Plus(US)_V1_180608 26 June 2018

    Release notes — disclosure 0.31 
    Optimize the IOT funtion.

    Archived page, fetched 29 September 2026

Evidence

One archived page sits behind this record, the earliest read on 1 August 2026. Everything above was read from it, and each is kept byte for byte so it can be checked after the vendor edits the original.

Identifiers: marketing_name Deco M9 Plus

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

Machine-readable: JSON · RSS