Deco M9 Plus v2

Actively updated well evidenced

firmware is arriving about as often as it always has

6 days since the last release against a median gap of 143 (0.0x)

Last firmware: 24 September 2026 (6 days ago)
Releases seen: 14
Update rhythm: about every 5 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.

Deco M9 Plus v1 (US) Slowing down 16 releases

Firmware history

Deco M9 Plus(US)_V2_1.9.2 Build 20260818 24 September 2026
Release notes — disclosure 0.06
```
Improved system security and stability.
```
Archived page, fetched 29 September 2026

Deco M9 Plus(US)_V2_1.9.1 Build 20250612 29 July 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

Deco M9 Plus(US)_V2_1.8.1 Build 20250219 15 May 2025
Release notes — disclosure 0.25
```
Bug Fixes: 1. Fixed the bug of not being able to watch youtube, netflix, etc. after turning on the QOS function.
```
Archived page, fetched 29 September 2026
Deco M9 Plus(US)_V2_1.6.4 Build 20240718 22 August 2024
Release notes — disclosure 0.34
```
New Features/Enhancements: 1. Improve the device stability; 2. Enhance the system security.
```
Archived page, fetched 29 September 2026
Deco M9 Plus(US)_V2_1.6.3 Build 20231225 29 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
Deco M9 Plus(US)_V2_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

Deco M9 Plus(US)_V2_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

Deco M9 Plus(US)_V2_1.5.6_211018 24 December 2021

Release notes — disclosure 0.55

Modifications and Bug Fixes: 1. Optimized the network optimization function. 2. Optimized the client list module. 3. Optimized the experience of Alexa service. 4. Optimized the experience of adding and configuring IOT devices. 5. Improved system reliability. 6. Fixed the bug that port forwarding does not work in some scenarios. 7. Fixed the bug of not being able to add KASA devices on the app.

Archived page, fetched 29 September 2026

Deco M9 Plus(US)_V2_1.5.1_210126 19 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

Deco M9 Plus(US)_V2_200921 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

Deco M9 Plus(US)_V2_200725 10 August 2020
Release notes — disclosure 0.06
```
Improved stability, security and performance.
```
Archived page, fetched 29 September 2026
Deco M9 Plus(US)_V2_190926 14 October 2019
Release notes — disclosure 0.06
```
Modification and bug fixes: Optimized total performance.
```
Archived page, fetched 29 September 2026
Deco M9 Plus(US)_V2_190809 23 August 2019
Release notes — disclosure 0.06
```
Modifications and Bug Fixes: Improved total performance.
```
Archived page, fetched 29 September 2026
Deco M9 Plus(US)_V2_190801 16 August 2019
Release notes — disclosure 0.30
```
First firmware released.
```
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 30 September 2026. How these verdicts are computed.

Machine-readable: JSON · RSS