Cable modem only - not a router. The MB8611 handles your ISP connection but does not route traffic or provide Wi-Fi. Your router (connected to it) is your actual security perimeter. This device's risk is limited to the modem function only.
- Arris platform CVE history: The Arris hardware platform has documented vulnerabilities. The MB8611 is a cable modem, so the attack surface is narrower than a full router, but firmware security still matters.
- No security features - router dependent: This is a cable modem only. All security - firewall, VPN, device filtering - depends entirely on the router connected to it. Check your router's rating separately.
FCC & Ban Risk
64
/100
C
Supply chain · FCC status · CVEs · Patch support
Security Capabilities
19
/100
F
Zero-Trust · VPN · Segmentation · Monitoring
🏭 Manufacturer
Motorola brand (CommScope/Arris)
Motorola brand licensed to CommScope (Arris) - CommScope Inc., Hickory, NC
Manufactured in: Mixed
🏛️ FCC Status
FCC authorized
Not in scope
🛡️ Patch Support
Active (limited)
Whether security vulnerabilities are actively being patched
⚠️ Key Finding
medium
Arris platform CVE history
Router Security Updates
Get notified if new vulnerabilities are discovered for your Motorola MB8611. Free, no spam.
🔒
Security capabilities comparison
We benchmark your router against Rio Router across 8 dimensions so you can see exactly what gaps exist - and what a fully-covered setup looks like.
MOTOROLA
your router
Rio Router™
full standard
Zero-Trust Device Admission
Every new device is blocked by default - admin must approve it once, even if it has the right password
Not available
Available
Network Segmentation (VLANs)
Devices on your network are isolated from each other, so a hacked smart TV can't reach your laptop
Not available
Available
Router-Level VPN for All Devices
All traffic - including smart devices that can't run VPN apps - is encrypted before leaving your home
Not available
Available
Domain Allowlisting
Block everything except approved sites; more effective than trying to blacklist billions of harmful URLs
Not available
Available
Granular Password Control
Separate passwords per network zone - changing one doesn't affect others
Partial
Available
Guest Auto-Expiry
Guest devices are automatically removed when they leave; neighbors can't reconnect without re-approval
Not available
Available
Clean Supply Chain
Manufactured outside Chinese legal jurisdiction - not subject to China's National Intelligence Law
Available
Available
Active Threat Monitoring
DNS filtering, firewall, activity logs, and ongoing security patch support
Not available
Available
We use Rio Router as the benchmark because it’s the only consumer router built to score 8/8 on this framework - it shows you what a fully-covered setup looks like, not just what’s typical.
See Rio →
See all Motorola models: Motorola brand overview →
What you should do
1
Check your actual router's security rating - that device is your security perimeter
2
Verify the MB8611 is running current firmware via the admin panel
3
Consider: this device has a narrow attack surface; your router is the bigger security variable
How this was scored · verified March 2026: This rating combines FCC authorization status, manufacturer legal jurisdiction, CVEs from NIST NVD, active patch support status, and CISA advisory mentions. See full methodology →
Reference Data
Sources & evidence
All findings trace to publicly verifiable primary sources - US government databases, official FCC filings, and NIST CVE records. No proprietary or anonymous sources are used.
Full data source documentation: Scoring Methodology & Citations →