UniFi OS 6.0.17 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.6.109

• Identity Sync Service 1.8.8

Improvements

• Added configurable backup schedules, multiple backup destinations, local backup management, and an improved restore experience.

• Added a configurable session duration for Remember Me in Local Login.

• Added Console resource reporting to Control Plane settings.

• Added support for internationalized domain names in automatic certificates.

• Added application update guidance when an adopted device requires a newer application version.

• Added a STARTTLS option for custom mail servers.

• Added a manual override for device upgrades, reboots, and resets during critical operations.

• Improved storage reliability and resiliency.

• Improved application installation resiliency.

• Improved WAN SLA reliability.

• Improved reporting to Site Manager

• Improved system reliability

• Improved mDNS stability

• Improved UniFi OS backup restore reliability.

• Improved application update behavior after firmware updates by only updating applications with auto-update enabled.

• Improved ownership transfers with a clearer pending status.

  • Transfers to UI Accounts now complete after the recipient accepts the invitation.

• Improved DNS and DHCP resiliency under heavy device load.

• Improved Application Rollback resiliency.

• Improved DNS resiliency when DNS-over-HTTPS providers rotate their server certificates.

• Improved time synchronization resiliency.

• Improved authentication reliability during two-factor challenges.

• Improved Bluetooth reliability during setup.

• Improved SFP negotiation speed.

• Improved 1 Gbps link reliability when using the UACC-CM-RJ45-MG SFP module.

• Improved Shadow Mode resiliency.

• Upgraded the Debian distribution to Trixie.

• [UDM/UDM-Pro/UDM-SE/UDM-Pro-Max] Improved PPPoE throughput for IPv6.

• [UDM-Pro/UDM-SE/UDM-Pro-Max] Added LAG support for SFP ports.

• [UDM-Pro-Max/UDM-Beast] Improved storage resiliency during RAID reshape operations.

• [UDM-Pro-Max/UDM-Beast] Improved RAID scrubbing.

• [UDM-Beast] Improved hardware offloading.

Bugfixes

• Fixed an issue where WAN failover could trigger unnecessary DHCP renewals.

• Fixed an issue where Policy-Based Routing could fail when many WireGuard tunnels were connected.

• Fixed an issue where Network Application updates were not displayed when the application failed to start.

• Fixed an issue where VPN client DNS settings could affect DNS resolution for all LAN clients.

• Fixed connectivity issues affecting WireGuard VPNs.

• Fixed an issue where Add New Person could become unresponsive when Remote Access was disabled.

• Fixed an issue where DHCP leases could become corrupted after a High Availability failover, causing clients to receive incorrect IP addresses.

• Fixed an issue where PPPoE configuration errors could cause connection instability.

• Fixed an issue where heavy DNS traffic during a network outage could cause system instability when Content Filtering or Ad Blocking was enabled.

• Fixed an issue where Honeypot alerts could stop being reported after a large number of detections.

• Fixed an issue where WireGuard clients using IPv6 could lose connectivity after the WAN IPv6 prefix changed.

• Fixed an issue where WAN interfaces using MAC Cloning could fail to obtain an IP address after reconnecting the cable.

• Fixed an issue where deleting a network using a delegated IPv6 prefix could cause other networks to change IPv6 addresses after a reboot.

• Fixed an issue where WAN DHCP connectivity could drop.

• Fixed an IPS/IDS SIP signature parsing issue.

• Fixed an issue where a disabled port could become enabled again after a reboot.

• Fixed incorrect At Risk status reporting for disks with an extremely high power cycle count.

• Fixed an issue where the Dashboard could show no data and all ports could appear offline after upgrading when using PPPoE with additional IP addresses.

• Fixed an issue where a LAN DNS server could become unreachable after a reboot when Honeypot was enabled on the network.

• Fixed an issue where OpenVPN connections using an imported configuration with AES-256-CBC could fail to establish.

• Fixed an issue where DNS resolution for Policy-Based Routing could fail after restoring a backup that changed the WAN connection type.

• Fixed issues where a Shadow console could remain offline or fail to synchronize UniFi Network after a primary restart or failback.

• Fixed an issue where large UniFi Network backups could time out before completion.

• Fixed an issue where reinstalled applications could later stop because a previously disabled state was retained.

• Fixed an issue where declining an invitation could remove an existing administrator's cloud identity or permissions.

• Fixed an issue where the factory reset confirmation could obscure the critical operation review dialog.

• Fixed missing application update failure events in System Log.

• Fixed an issue where UniFi Endpoint invitations could incorrectly show Specific Wi-Fi Connection Required when connected to the correct network.

• Fixed an issue where blocked flows were not shown for the Block Invalid Traffic Firewall Policy.

• Fixed an issue where Sent and Received traffic values were reversed in Traffic Info.

• Fixed an issue where application and category information could be missing in Traffic Flows.

• Fixed an issue where Ad Blocking could prevent some websites from functioning correctly.

• Fixed an issue where multiple PPPoE WAN connections could use DNS servers from the wrong ISP.

• Fixed an issue where scheduled Firewall and Content Filtering rules could apply incorrectly on Sundays.

• Fixed link-local addresses being incorrectly reported as WAN addresses.

• Fixed an issue where Alarm Manager emails were not sent to local administrators when Remote Access was disabled.

• Fixed an issue where device lists could fail to synchronize with the cloud on consoles managing large numbers of devices.

• Fixed an issue where console configurations could fail to synchronize with Fabric after switching organizations.

• Fixed an issue where application updates could install a different version than the one displayed as available.

• [UDM] Fixed an issue where some switch ports could become disabled after an upgrade.

• [UDM-Pro/UDM-SE/UDM-Pro-Max/UDM-Beast] Fixed an issue where Shadow Mode setup could fail after a temporary connection loss to the primary console.

• [UDM-Pro/UDM-SE/UDM-Pro-Max/UDM-Beast] Fixed an issue where a Shadow Mode gateway could fail to become active after a failover.

• [UDM-Pro-Max/UDM-Beast] Fixed incorrect Storage Not Initialized warnings and Erase and Format prompts when drive bays were empty and built-in storage was healthy.

• [UDM-Beast] Fixed missing Virtual Network Override options.

• [UDM-Beast] Fixed an issue where hardware offloading did not work correctly in Shadow Mode.

• [UDM-Beast] Fixed an issue where High Availability setup could fail when using a custom Native VLAN on the sync port.

• [UDM-Beast] Fixed an issue where Deep Inspection domain category updates could cause the device to run out of memory and restart.

• [UDM-Pro/UDM-SE/UDM-Pro-Max/UDM-Beast] Fixed a compatibility issue with 4Kn disks.

UniFi OS 5.1.35 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67

• Identity Sync Service 1.8.8

Bugfixes

• Fixed the security vulnerability tracked as CVE-2026-98432.

UniFi OS 5.1.34 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67

• Identity Sync Service 1.8.8

Improvements

• Revoked compromised eMudhra CA certificates.

UniFi OS 5.1.33 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67
• Identity Sync Service 1.8.4

Bugfixes

• Fixed an issue where applications could fail to install or update.

UniFi OS 5.1.31 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67
• Identity Sync Service 1.8.4

Improvements

• Improved Shadow Mode resiliency.
• Improved device stability.

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 067.
• Fixed the security issues mentioned in Security Advisory Bulletin 069.

UniFi OS 5.1.30 includes the improvements and bugfixes below.

Bundled

• UniFi Network 10.5.67
• Identity Sync Service 1.8.3

Improvements

• Improved Shadow Mode resiliency.
• Improved device stability.

UniFi OS 5.1.27 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved device stability.

UniFi OS 5.1.26 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved device stability.
• Improved Shadow Mode resiliency.
• Improved WAN failover resiliency.
• Improved IPS/IDS memory usage.
• Updated Suricata to version 8.0.6.
• Requires Network Application 10.5.48 or newer.
• [UDM-Beast] Improved hardware offloading.
• [UDM-Beast] Improved reliability on the SFP28 ports.

Bugfixes

• Fixed an issue where "Remember Me" local login sessions expired sooner than expected following recent security updates.
• "Remember Me" sessions now remain active for up to 30 days. Re-authentication is still required after UniFi OS upgrades and console reboots.
• For the best authentication experience, use the UniFi Mobile App or unifi.ui.com.
• Fixed an issue where IPS/IDS rule updates could fail, resulting in no IPS/IDS rules being applied.
• Fixed an issue where WAN monitors could fail to resolve when using LAN DNS servers on WAN interfaces.
• Fixed an issue where PPPoE 1500 MTU could stop working after a reboot.
• Fixed an issue where remote mDNS hosts could not be discovered.
• Fixed an issue where the Access application would start when starting the Protect application.
• [UDM-Beast] Fixed incorrect RX error counts on RJ45 ports.

UniFi OS 5.1.19 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved backup restore resiliency.
• Improved system stability.
• [UDM-Beast] Improved compatibility with Verizon Fios ISP.
• [UDM-Beast] Improved max concurrent Site Magic tunnels.

Bugfixes

• Fixed an issue where a false “No DNS IP Address” message could appear on the screen in rare cases.
• Fixed an issue where loop protection didn't work correctly in rare cases.
• [UDM-beast] Fixed SNMP monitoring using UDP port forwarding.
• Fixed the security issues mentioned in Security Advisory Bulletin 066.

UniFi OS 5.1.15 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved system stability.
• [UDM-Beast] Improved the resiliency of the Hardware Offload Engine.

Bugfixes

• Fixed an issue where DNS queries could fail over IPv6 when Content Filtering is used.
• Fixed an issue where obtaining a WAN IP could fail when receiving a malformed DHCP Option 3 on WAN.
• Fixed the security issues mentioned in Security Advisory Bulletin 065.

UniFi OS 5.1.12 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.
• Added the ability to revert applications and restore configuration backups.
• Allowed Super Admins to restore local backups.
• Improved the Alarm Manager user experience.
• Improved IDS/IPS performance and CPU utilization.
• Improved multi-WAN failover behavior and resiliency.
• Improved VPN stability across IPsec, WireGuard, and OpenVPN.
• Improved DNS over HTTPS (DoH) stability and configuration handling.
• Improved system stability.
• Improved SFP connectivity.
• Improved WireGuard connectivity resiliency.
• Improved backup restore resiliency.
• Improved DNS cache responsiveness.
• Improved firmware upgrade behavior by updating the Network Application to the latest official release after an upgrade.
• Improved device discovery and overall device stability.
• Improved storage mounting resiliency.
• Improved the app restoration experience after a firmware update.
• Improved compatibility with ISPs that require periodic ARP on the WAN.
• [UDM] Improved WiFi stability.
• [UDM-Pro-Max] Improved hot-plug disk resiliency.
• [UDM-Pro|UDM-SE] Improved stability by using the native UniFi Network Application.

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 064.
• Fixed an issue where QoS configuration was not restored after a PPP interface reconnected.
• Fixed an issue where OpenVPN client disconnection notifications could be inaccurate.
• Fixed an issue where large file downloads could intermittently fail.
• Fixed an issue where VPN failover scenarios could leave tunnels established but traffic blackholed.
• Fixed an issue where WireGuard fallback behavior did not activate as expected.
• Fixed an issue where OpenVPN DNS query storms could occur when multiple tunnels were configured.
• Fixed various DHCP and IPv6 edge cases that could result in connectivity issues.
• Fixed excessive IGMP join and leave log entries on WAN interfaces.
• Fixed an issue where QoS CPU affinity settings were not properly restored after disabling Smart Queues.
• Fixed an issue where the ping monitor behavior was incorrect when using LAN DNS servers.
• Fixed an issue where DDNS updates could fail with Cloudflare.
• Fixed an issue where custom NTP servers could be overridden after reboot.
• Fixed an issue where Protect incorrectly reported disks as “At Risk” when they had different capacities or RPM values compared to other disks in the RAID array.
• Fixed an issue where IPsec traffic could be lost.

UniFi OS 5.1.11 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.3.58

Improvements

• Improved the user experience during app restoration after a firmware update.
• Improved routing performance for traffic over Link Aggregated ports.

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 064.
• Fixed an issue where IPS/IDS events were always reported as low risk.
• Fixed an issue where non-Network UniFi devices did not appear in the UniFi device list when they were on a VLAN.
• Fixed an issue where application auto-updates could fail after a firmware update.

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.
• Added the ability to revert applications and restore configuration backups.
• Allowed Super Admins to restore local backups.
• Improved the Alarm Manager user experience.
• Improved IDS/IPS performance and CPU utilization.
• Improved multi-WAN failover behavior and resiliency.
• Improved VPN stability across IPsec, WireGuard, and OpenVPN.
• Improved DNS over HTTPS (DoH) stability and configuration handling.
• Improved system stability.
• Improved SFP connectivity.
• Improved WireGuard connectivity resiliency.
• Improved backup restore resiliency.
• Improved DNS cache responsiveness.
• Improved firmware upgrade behavior by updating the Network Application to the latest official release after an upgrade.
• Improved device discovery and overall device stability.
• Improved storage mounting resiliency.
• Improved the app restoration experience after a firmware update.
• Improved compatibility with ISPs that require periodic ARP on the WAN.
• [UDM] Improved WiFi stability.
• [UDM-Pro-Max] Improved hot-plug disk resiliency.
• [UDM-Pro|UDM-SE] Improved stability by using the native UniFi Network Application.
• [UDM-Beast] Improved routing performance for traffic over link-aggregated ports.

Bugfixes

• Fixed an issue where QoS configuration was not restored after a PPP interface reconnected.
• Fixed an issue where OpenVPN client disconnection notifications could be inaccurate.
• Fixed an issue where large file downloads could intermittently fail.
• Fixed an issue where VPN failover scenarios could leave tunnels established but traffic blackholed.
• Fixed an issue where WireGuard fallback behavior did not activate as expected.
• Fixed an issue where OpenVPN DNS query storms could occur when multiple tunnels were configured.
• Fixed various DHCP and IPv6 edge cases that could result in connectivity issues.
• Fixed excessive IGMP join and leave log entries on WAN interfaces.
• Fixed an issue where QoS CPU affinity settings were not properly restored after disabling Smart Queues.
• Fixed an issue where the ping monitor behavior was incorrect when using LAN DNS servers.
• Fixed an issue where DDNS updates could fail with Cloudflare.
• Fixed an issue where custom NTP servers could be overridden after reboot.
• Fixed an issue where Protect incorrectly reported disks as “At Risk” when they had different capacities or RPM values compared to other disks in the RAID array.
• Fixed an issue where IPsec traffic could be lost.

This is the initial release for the UDM-Beast.

Bundled application

• UniFi Network 10.2.105

Bundled application

• UniFi Network 10.0.162

Improvements

• Improved system stability.
• Improved DHCP resiliency for clients that do not comply with the RFC.

UniFi OS 5.0.12 includes the improvements listed below.

Bundled application

• UniFi Network 10.0.162

Improvements

• Added time/date mismatch toast messages.
• Improved the Internet connectivity check.
• Improved the backup and restore resiliency.
• Improved the device discovery process for faster detection.
• Improved certificate file validation.
• Improved Shadow Mode resiliency.
• Improved Web UI Stability and performance.
• Improved the Alarm Manager user experience and resiliency.
• Improved WAN throughput reporting when having more than 2 WAN interfaces.
• Improved system stability.
• Improved Speed Test stability.
• Updated Traffic Identification signatures.
• [Identity] Renamed Group to Role when the console is managed by Fabric.
• [UDM] Improved WiFi stability.
• [UDM-Pro/SE] Improved compatibility with HDD WD43PURZ-74BWPY0.
• [UDM-Pro/SE] Improved Link Aggregation stability.

Bugfixes

• Fixed an issue where Policy-Based Routing rules were ignored for VPN Client Traffic, causing traffic to route via the wrong WAN interface.
• Fixed an issue where IPv6 addresses didn't show up for WAN interfaces.
• Fixed an STP-related network loop issue in Shadow Mode when using dual LAN switch deployments.
• Fixed an issue where a corrupted WireGuard remote peer address was not restored in Shadow Mode Mesh deployments.
• Fixed a WireGuard site-to-site connection issue when using a specific WAN listen address.
• Fixed an OpenVPN connection resiliency issue that could cause reconnection failures during renegotiation.
• Fixed incorrect SFP voltage readings from SFP modules.

UniFi OS 5.0.10 includes the improvements and bugfixes listed below.

Bundled application

• UniFi Network 10.0.162

Improvements

• Added time/date mismatch toast messages.
• Improved the Internet connectivity check.
• Improved the backup and restore resiliency.
• Improved the device discovery process for faster detection.
• Improved certificate file validation.
• Improved Shadow Mode resiliency.
• Improved Web UI Stability and performance.
• Improved the Alarm Manager user experience and resiliency.
• Improved WAN throughput reporting when having more than 2 WAN interfaces.
• Improved system stability.
• Updated Traffic Identification signatures.
• [UDM] Improved WiFi stability.
• [UDM-Pro/SE] Improved compatibility with HDD WD43PURZ-74BWPY0.
• [UDM-Pro/SE] Improved Link Aggregation stability.

Bugfixes

• Fixed an issue where Policy-Based Routing rules were ignored for VPN Client Traffic, causing traffic to route via the wrong WAN interface.
• Fixed an issue where IPv6 addresses didn't show up for WAN interfaces.
• Fixed an STP-related network loop issue in Shadow Mode when using dual LAN switch deployments.
• Fixed an issue where a corrupted WireGuard remote peer address was not restored in Shadow Mode Mesh deployments.
• Fixed a WireGuard site-to-site connection issue when using a specific WAN listen address.
• Fixed an OpenVPN connection resiliency issue that could cause reconnection failures during renegotiation.
• Fixed incorrect SFP voltage readings from SFP modules.

UniFi OS 4.4.6 includes the improvements and bugfixes listed below.

Bundled application

• UniFi Network 9.4.19

Improvements

• Added a Block Page for Content Filtering and Ad-Blocking.
• Requires UniFi Network 9.4.11 or newer.
• Added IPv6 support for the Direct Connect feature.
• Improved disk detection logic to prevent certain HDDs from being misidentified as SSDs when RPM data is unavailable via S.M.A.R.T.
• Improved DNS monitoring resiliency for WAN SLA.
• Improved Alarm Manager.
• Improved IPsec VPN connection stability.
• Improved Remote Access connection resiliency.
• Improved storage mounting resiliency.
• Improved the setup experience for Shadow Mode.
• Improved the Shadow Mode failover time.
• Prevent transferring ownership while the device is hosting Identity Hub.

Bugfixes

• Fixed an issue where you could experience excessive logging related to MAC address scanning.
• Fixed the Traffic Activity display for clients.
• Fixed a gateway configuration issue when applying IPv6 NAT.
• Fixed false-positive alerts claiming that the DHCP pool is running out of addresses.
• Fixed an issue where Static Routes were missing after removing Shadow consoles.
• Fixed an issue where local account users did not receive email notifications.
• Fixed an issue where static routes were missing after switching the WAN type from dynamic to static.
• Fixed an issue where DDNS didn't function correctly when using dual PPPoE WAN connections.
• Fixed an issue where content filtering didn't apply to specific traffic flows.
• Fixed an issue with WireGuard VPN server when using non-primary WAN interfaces.
• Fixed an issue where RADIUS authentication could fail when using anonymous identity.
• [UDM-Pro] Fixed an issue where the Network Application could fail to start after an HDD replacement when Traffic Flows are stored on disk.

UniFi OS 4.3.6 includes Alarm Manager for Network, Cloudflare Content Filtering and improvements and bugfixes listed below.

Bundled application

• UniFi Network 9.2.87

Improvements

• Added support for CNAME DNS Records.
• Requires UniFi Network Application 9.3 or newer.
• Added support for Alarm Manager.
• Requires UniFi Network Application 9.3 or newer.
• Added support for Enhanced Content Filtering with CyberSecure.
• Requires UniFi Network Application 9.3 or newer.
• Requires an active CyberSecure subscription for granular content categories powered by Cloudflare.
• Added the ability to create a new user account while performing the ownership transfer.
• Improved the Analytics and Data Sharing user experience.
• Added the ability to completely turn off data sharing.
• Improved Flows data accuracy.
• Improved Hostname resolution.
• Improved Incoming Interface listing for Threats.
• Improved the Shadow Console resiliency.
• Improved DDNS resiliency when a non-primary WAN is used.
• Improved the Admins and Users management user experience.
• Improved Remote Access connection resiliency.
• Improved backup and restore resiliency, including better feedback when a restore fails.
• Improved storage health reporting.
• Updated Traffic Identification signatures.

Bugfixes

• Fixed an issue where the Release channel could change unexpectedly.
• Fixed an issue where transfer ownership could fail in rare cases.
• Fixed an issue where local users didn't receive email notifications using a custom SMTP server.
• Fixed an issue where you couldn't configure SNMP Location and Contact separately; both were required.
• Fixed an issue where users would be required to re-login every hour locally.
• Fixed an issue where the "Plug in Internet Cable" could be shown in rare cases.
• Fixed routing issues when the same subnets are configured on multiple IPsec VPNs.

UniFi OS 4.2.12 adds support for Traffic Flows, Advanced mDNS options and includes the improvements and fixes listed below.

Bundled application

• UniFi Network 9.0.114

Improvements

• [UDM-Pro/UDM-SE/UDM-Pro-Max] Added support for Traffic Flows.
• Requires UniFi Network Application 9.1 or newer.
• Added the ability to generate specific support files.
• Added support for configuring different release channels per application.
• Added support for Hotspot Portal Certificates.
• Required Network Application 9.1 or newer.
• Added advanced options for mDNS.
• Required Network Application 9.1 or newer.
• Added support for SIEM Server integration.
• Improved WireGuard VPN stability.
• Improved BGP resiliency.
• Improved SFP speed detection.
• Improved the backup and restore user experience.
• Improved System Logs.
• Improved storage resiliency and reporting.
• Improved system stability.
• Improved static WAN failover resiliency.
• Improved DHCPv6 WAN stability.
• Improved DS-Lite compatibility.
• Improved Shadow Mode resiliency.
• [UDM] Improved WiFi connection stability.
• [UDM] Improved WiFi configuration resiliency after radar detections.
• [UDM-Pro-Max] Improved Samsung SSD compatibility.

Bugfixes

• Fixed rare gateway configuration errors.
• Fixed an issue where Policy-Based Routing could stop working in rare cases.
• Fixed an issue where you could receive false-positive DHCP exhaustion alerts.