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UniFi OS (Dream Machines) 5.1.11 (release candidate) – safe to update?
Not a stable release: Ubiquiti lists 5.1.11 as a release candidate (RC) on its release page, not a general-availability release. Community so far: 1 problem report and 2 positive reports found on Reddit (plus 8 other mentions). Out for 156 days; a few isolated problem posts is normal background for a product this widely used. Skim them if your setup is similar.
Release candidate / early access
UniFi OS (Dream Machines) 5.1.11 is not a stable release: Ubiquiti lists 5.1.11 as a release candidate (RC) on its release page, not a general-availability release. Only devices on the vendor's release-candidate or early-access channels are offered it. Most people should stay on the latest stable release, UniFi OS (Dream Machines) 5.1.33.
Newer release in this line: UniFi OS (Dream Machines) 5.1.33 (2026-09-09). If you're updating now, check that one instead — it may already fix the issues reported here.
Did you install 5.1.11?
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What's in this release
Overview UniFi OS 5.1.11 includes the improvements and bugfixes below. Bundled application • UniFi Network 10.3.58 Improvements • Added support for Ad Blocking and Content Filtering with Policy-Based Routing. • Added support for IPv6 WireGuard VPN clients. • Added support for automatic Let’s Encrypt certificates. • Ad…
Source: community.ui.com RSS
CVEs fixed
No CVEs mapped to this release.
Community reports
- Problem
UnifiOS 5.1.11 on UDR7 - IPv6 Sourced DNS Queries Fail with Content Filtering Enabled · Reddit · 2026-05-17
- Problem
UnifiOS 5.1.11 on UDR7 - IPv6 Sourced DNS Queries Fail with Content Filtering Enabled · Reddit · 2026-05-17
I recently (manually via SSH) updated to UnifiOS 5.1.11 on my Unifi Dream Router 7 and found an issue with DNS queries and the (built-in) CyberSecure Content Filtering. I get SERVFAIL returned when I do a DNS query to the local IPv6 address (i.e., 2xxx::1) and Content Filtering…
- Fine
E-NVR Ver 5.1.11 adds Connect App · Reddit · 2026-05-18
As the title says, 5.1.11 update for my Enterprise-NVR now adds the Unifi Connect app - this is great! And makes sense with the link to connect + access that the EV chargers wants, and shows they are not leaving (hopefully) Connect to the dustbin. edit: Link to unifi update rele…
- Fine
Significant lower memory usage after updating to 5.1.11 · Reddit · 2026-05-17
Updated my UDM SE today to 5.1.11 and just noticed when checking Home Assistant and verifying in my UniFi app that the memory usage finally is no longer stuck at 90-95% memory usage but dropped down to 75-80% I only am running one AP, a few switches and a G6 Entry at the moment…
- Mention
EBay thinks I’m in china…..any help? · Reddit · 2026-05-27
Anyone know of any setting in ubiquiti that would make eBay think I’m in china? I switched to a new fiber internet and updated my unifi router to 5.1.11 and was having frequent spf+ disconnects. I restored and then the next day 5.1.12 came out and issues were gone but now when c…
- Mention
Security Advisory Bulletin 064 · Reddit · 2026-05-22
This one has a CVE score of 10 - pay attention to it! Overview Published: May 21, 2026 Version: 1.0 Revision: 1.0 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to…
- Mention
Constantly getting “device offline” notifications, despite Camera being online uninterruptedly · Reddit · 2026-05-20
UCG Fiber 5.1.11 + G6 Instant Protect 7.1.60
- Mention
UPS 2U - UDM Pro and UNAS Pro Pairing Issues · Reddit · 2026-05-18
https://preview.redd.it/xs5ogwe5ry1h1.png?width=372&format=png&auto=webp&s=d6db81a64cced5742539262a958199db68b6f667 https://preview.redd.it/dprchki7ry1h1.png?width=369&format=png&auto=webp&s=19f01375b6537445d91cd3121d7754215474ba37 https://preview.redd.it/be67nlknty1h1.png?width…
- Mention
Need some help, I’m missing something · Reddit · 2026-05-18
Why am I able to connect to two of my sites remotely, flawlessly, yet if I am local to the site I’m unable to direct connect and sometimes not connect to at all? I’m unable to surf any sites, and my production broadcast is not able to go out. It’s so bad that WiFi man errors out…
- Mention
Anyone Have UCG Fiber 5.1.10 firmware · Reddit · 2026-05-17
So 5.1.11 completely obliterated my isp speeds I was on 5.1.10 but I cannot find it anywhere I was only able to find 5.0.16 does anyone have .10 anywhere ?
- Mention
Superlink Key Fob · Reddit · 2026-05-17
So the Key Fob just arrived, adopted easy. But it wont let me add Arm / Disarm without having Global Alarm settings turned On. The only problem is when i go to change that setting it says unable to update the NVR? Any thoughts on how to solve? ive restarted the NVR still wont wo…
- Mention
UCG setup WPA3 enterprise using device mac addresses · Reddit · 2026-05-17
Hi, I have a Mac, I would like to try out setting up WPA3 enterprise instead of WPA3 using the built-in Radius server. But I am stuck... I have a cloud gateway running Unifi Os 5.1.11 and network 10.4.57. AP is a Unifi U7 AP lite running 8.6.10 Radius Server Setting > Network >…
Reports are found automatically and labelled by an AI model plus keyword rules — they can be wrong. Open the post to judge for yourself.
UniFi OS (Dream Machines) 5.1.12 →
Other UniFi OS (Dream Machines) versions
- 5.1.33 2026-09-09
- 5.1.31 2026-08-20
- 5.1.30 Release candidate / early access 2026-08-17
- 5.1.27 Release candidate / early access 2026-08-04
- 5.1.26 2026-07-22
- 5.1.19 2026-06-17
- 5.1.15 2026-06-01
- 5.1.12 2026-05-21
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