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Forum Discussion
Spraragen88
Aug 24, 2025Aspirant
Now Spectrum has updated the CM3000 to version 6.01.03 - they refuse to roll it back
This darn broken firmware has made its way to Spectrum. They refuse to believe the only solution is to rollback to 5.0.X as proven method by Xfinity and other ISPs who dealt with this mess months ago...
KristopherK2024
Jul 31, 2025Aspirant
Hello:
Thought I would add to the issue regarding Cox Cable.
Have had same issue since Cox updated the CM3000 to version 6.01.03, likely in May. Have had 4 Cox service calls and last one finally advised either modem itself or bad firmware. He did advise he doubted Cox had ability to do firmware rollback, as had never heard of that happening. He advised if I got a new CM3000, unless the problem version had been suspended by Cox, the new modem would likely get immediately updated as part of the provisioning process. His only recommendation was to wait till next firmware update and see if fixed issues.
That is DOA; so likely giving it another week or so to see if Cox Cable initiates a rollback or will just buy Arris S34 and be done with this nonsense.
Find it hard to believe the firmware issue made it past both NETGEAR and Cox. Have usually had good luck with NETGEAR as also have Orbi 972 and it has been great.
Thanks
Kris
- FURRYe38Jul 31, 2025Guru - Experienced User
Only ISPs have the ability to update or downgrade FW on modems connected to there system.
There is known issues with v6 FW and CC/XF have already begun to downgrade there users with the CM3000 modem back to v5 FW.
Cox I presume has same abilities to downgrade FW. Should have at least. Keep in contact with the ISP and request a FW downgrade back to prior working version.
How long have you had the CM3000 modem?
YA ISP should have tested new FW prior to pushing it. Possible they didn't or didn't test it well. It's on ISPs to test and certify FW that comes from modem Mfrs before they release it.
- FURRYe38Jul 31, 2025Guru - Experienced User
Can you give details on what issues you have been seeing with v6 FW loaded on your CM3000?
- KristopherK2024Aug 01, 2025Aspirant
GUI unresponsive.
Upstream light refuses to lock. Modem shows poor connection status. OFDMA channels refuse to lock.
If power cycle, sometimes all lights will lock. Modem shows good connection and shows 2 OFDMA channels are locked. However, only lasts 20-40 minutes before internet connectivity fails, even though all lights show fine. Have to power cycle to try and get connectivity back.
If power cycle several times, can get somewhat stable connectivity, but upstream light refuses to lock and OFDMA not locked and modem shows poor connection, but will hold that status for several days. Upstream/downstream speeds highly erratic.
- KristopherK2024Aug 01, 2025Aspirant
Got it new in March from Netgear under warranty; was replacement unit as my old one had several of the LED lights burn out. If I had been thinking would have confirmed the firmware on it when arrived. Started acting up in May, which is when the cox tech said he thought Cox had pushed out V6 of firmware.
Will keep on Cox ISP, but even the Cox tech said he was unable to directly interface with the DOCSIS engineer group. With Cox's pending merger with Spectrum not sure how anything is going to be handled going forward. 1st and 2nd tier customer support, off shore mostly, is terrible, I know more than they do, which is not much.
- FURRYe38Aug 01, 2025Guru - Experienced User
OK, send your info to NG. Ya v6 came out a few months ago. Hopefully NG can make contact with Cox in that direction and help them push prior working FW to your modem.
- BrokenRubberAug 24, 2025Aspirant
Same issue with my modem, had 5 techs on site they replaced everything inside and outside my home, made a FCC complaint with cox they replaced a bunch of stuff on the street as well as the hub and still having the same problems as so many other people (up stream not locking, constant disconnects, intermittent disconnects, and disconnects where nothing show up in the logs and everything shows good connection but have no internet) i really wish i could have returned this modem at this point, i bought it back in may it worked for about 20 days and than the problem's started when they pushed this firmware. and here we all are with a 300$ piece of useless equipment. kind of crazy this has started 3 months ago and netgear hasn't really done anything to fix this.