Deco mesh has some devices unable to access internet following firmware
M5 mesh network, I Updated the firmware to 1.8.5 20250612 rel 44225.
Since the update the devices all access the M5 deco units but some (but not all) can't now "see" the internet. So my SkyQ box has connection with the network but no internet access. The Sonos worked fine but since resetting it to fix a different problem, it cannot now access the internet to allow Alexa voice control.
connecting directly to the router everything works.
Where do I start? The iPad I'm typing on is connected to the same M5 but has full internet access, so it's not every device.
thanks
david
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@DavidHall 
How about the 1.9.1 build 20250909 firmware here:
It is supposed to be the next official firmware for Deco M5, which also adds the security fixes here:
https://community.tp-link.com/en/home/forum/topic/842750
Wait for your reply.
Best regards.
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I just updated my M5 mesh decos (v3.0) to 1.9.0 the latest version available, and I am also on virgin media. Using system in router mode with the virgin router in modem mode. I am also getting the CNC classification and IP of 194.168.4.100 on many home devices and is causing a real issue with all equipment and smart home / iot devices. What can I do as I am unable to roll back the firmware?
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Getting the same issue on an M5 with firmware version 1.9.0
What's the fix ?
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I am having the same issue, my M5 updated last night and today it quarantined all my devices and blocked access to my work website. I am with Virgin
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Hi, the latest 1.9.1 firmware for Deco M5 has already fixed the "CNC Attack" under the Virgin Media service. Please make sure the firmware on the Deco M5 is up-to-date.
Deco M5_V1/V2/V3 |
1.9.1_build_20250909_Official |
Best regards.
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