This router has documented security problems. Every device on this network — your work laptop, banking app, Ring camera, smart lock — is running at higher risk than it should be.
An F is not a warning — it’s a finding that the router has been independently flagged for security or supply-chain concerns serious enough to warrant action.
-
A real gap that affects every device sharing this Wi-Fi
It affects every device sharing this Wi-Fi — your work laptop, your phone, your kids' devices, your security cameras. Not the most urgent threat on the page, but a real edge an attacker can use to reach the rest.
Show technical detail
Public hotspot broadcasting - default on: Same as XB7: broadcasts a public xfinitywifi hotspot from your home hardware by default.
-
Login credentials passing through this router can be captured
Login credentials — including router admin, Wi-Fi, and anything passed through an unencrypted connection — are at risk.
Show technical detail
Comcast 2023 breach - credentials at risk: If you haven't changed Xfinity credentials since late 2023, your account may still be compromised.
-
A small gap that still touches every device on this network
A small gap, not an urgent one — but it still touches everything on this network: your work laptop, your phone, your security cameras, and any guest device that joins the Wi-Fi.
Show technical detail
ISP-controlled firmware: Comcast pushes firmware updates without your approval.
An A-rated alternative is shown below.
We'll email you if a new vulnerability hits your Xfinity xFi Gateway XB8. One email per incident. No spam.
- Comcast documentation ↗
- CVE-2023-4966 · Dec 2023 ↗
- Comcast Terms of Service ↗
- FCC Equipment Authorization Database ↗
- FCC Covered List · National Security Designation ↗