81% of ePMP radios tracked in this snapshot are running firmware that’s been superseded — some by over two years. Here’s what those networks are leaving behind.
In a sampling of 14,238 ePMP radios, only about one in five is running the current recommended firmware. 64% are on 5.10.0 or later and already have access to the latest features like MU-MIMO, Asymmetric Uplink Bandwidth, and 6 GHz AFC tools — one upgrade away from 5.11.x. The remaining 36% are on pre-5.10 firmware, 16 to 34+ months behind. Every one of these improvements shipped as a free software update. Operators who stay current continuously extract more value from the hardware they’ve already paid for. Those who don’t are leaving that investment sub-optimally deployed — risking support calls, churn, and missed opportunities to exceed customer expectations.
How Far Behind Is Each Firmware Group?
Approximate device counts by version · Release dates per Cambium support index · Staleness as of June 2026
Four New Capabilities That Require 5.10.x or Later
The 5.11.0 release (March 2026) and the 5.10.0 release (April 2025) together delivered substantial new capabilities — not just bug fixes. Networks still running older software are missing out on these features.
Asymmetric Uplink Bandwidth
Run a wide downlink channel where capacity matters and a narrower uplink where interference is the bigger concern. Same spectrum, less noise exposure, better SNR and fewer retries. Since upload demand is typically a fraction of download demand, this is a free performance improvement for most deployments. Unique in the industry and only on ePMP 4000 series from Cambium.
MU-MIMO Wireless Link Test
Identifies which SMs are eligible for MU2 or MU3 grouping and compares SU-MIMO vs. MU-MIMO throughput directly. Without this, you cannot confirm whether MU-MIMO is actually delivering gains on a given sector, or diagnose why it is not. Available on ePMP 4600 and 4500 series.
Antenna Gain Profiles Across Spectrum
Integrated antennas now use 8-point gain curves from real measurements rather than a flat gain value, more accurate EIRP calculations, better regulatory compliance, and automatic transmit power optimization where the antenna is less efficient. No configuration required.
AFC Analyzer for 6 GHz
Visualizes EIRP limits per channel for every AP and SM across the 6 GHz band. Operators can see exactly how individual SMs constrain available channels before making changes, eliminating trial-and-error during deployments or channel reconfigurations.
The Economic Case for Staying Current
Firmware upgrades do take effort and planning, but delaying them means missing capabilities you’ve already paid for by investing in 4000 Series hardware.
What Outdated Firmware Actually Costs
What’s Coming Next
The 5.12.x beta ships this summer with 4000 series SM-as-an-AP, AFC improvements (failover, caching, alternate channel), and more performance work. Networks already on 5.11.x can evaluate it quickly; those three or four releases behind should treat this as the right moment to catch up. Firmware management is an important aspect of running a profitable network. The operators with the lowest upgrade risk aren’t the ones who wait longest — they’re the ones who stay closest to the latest and greatest release.
Ready to Close the Gap?
Use cnMaestro to filter your network inventory by software version. Start with any AP on 5.9.x or below. Those sectors have the longest list of unresolved issues and missed capabilities.
VIEW RELEASE NOTES AND UPGRADE GUIDE