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

• Updated bundled services/applications.
• 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 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 WAN failover resiliency.
• Improved IPS/IDS memory usage.
• Updated Suricata to version 8.0.6.
• Requires Network Application 10.5.48 or newer.

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.

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.

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.
• 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.

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 DHCP client recovery when WAN connectivity is lost.
• Improved DNS over HTTPS (DoH) stability and configuration handling.
• Improved system stability.
• Improved SFP connectivity.
• Improved WireGuard connectivity resiliency.
• Improved stability by using the native UniFi Network Application.
• Improved compatibility with ISPs that require periodic ARP on the WAN.
• 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 WiFi stability.
• Improved the app restoration experience after a firmware update.

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 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 IPsec traffic could be lost.

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 DHCP client recovery when WAN connectivity is lost.
• Improved DNS over HTTPS (DoH) stability and configuration handling.
• Improved system stability.
• Improved SFP connectivity.
• Improved WireGuard connectivity resiliency.
• Improved stability by using the native UniFi Network Application.
• Improved compatibility with ISPs that require periodic ARP on the WAN.
• 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 WiFi stability.
• Improved the app restoration experience after a firmware update.

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 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 IPsec traffic could be lost.

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 Web UI Stability and performance.
• Improved the Alarm Manager user experience and resiliency.
• Improved WiFi stability.
• Improved WAN throughput reporting when having more than 2 WAN interfaces.
• Improved Speed Test stability.
• Improved system stability.
• [Identity] Renamed Group to Role when the console is managed by Fabric.

Bugfixes

• Fixed an issue where DNS could leak over VPN connections.
• Fixed an issue with weekday-based schedules.
• Fixed an issue where SD-WAN Spokes didn't reconnect to Hubs in rare cases when experiencing internet outages on the Hub.
• 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 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.

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 Web UI Stability and performance.
• Improved the Alarm Manager user experience and resiliency.
• Improved WiFi stability.
• Improved WAN throughput reporting when having more than 2 WAN interfaces.
• Updated Traffic Identification signatures.

Bugfixes

• Fixed an issue where DNS could leak over VPN connections.
• Fixed an issue with weekday-based schedules.
• Fixed an issue where SD-WAN Spokes didn't reconnect to Hubs in rare cases when experiencing internet outages on the Hub.
• 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 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.

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 DNS monitoring resiliency for WAN SLA.
• Improved Alarm Manager.
• Improved IPsec VPN connection stability.
• Improved Remote Access connection resiliency.
• Improved storage mounting resiliency.

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 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.

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 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

• Added support for Traffic Flows.
• Required 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 static WAN failover resiliency.
• Improved DHCPv6 WAN stability.
• Improved DS-Lite compatibility.
• Improved WiFi connection stability.
• Improved WiFi configuration resiliency after radar detections.
• Improved the backup restore process.
• Improved the handling of WireGuard tunnels on larger setups.
• Improved storage mounting resiliency.
• Improved the backup restore process.
• Improved system stability.
• Improved storage status reporting.

Bugfixes

• Fixed an issue where you could receive false-positive DHCP exhaustion alerts.
• Fixed an issue where priority frames weren't handled correctly for IGMP Snooping.
• Fixed an issue where the Packet Captures could get corrupted.
• Fixed rare gateway configuration errors.
• Fixed an issue where Policy-Based Routing could stop working in rare cases.

UniFi OS 4.1.22 includes the bugfix listed below.

Bundled application

• UniFi Network 8.6.9

Bugfixes

• Fixed the inability to update or install applications.

adds support for Directory Integration, Custom Certificates, BGP, NetFlow, and Packet Captures.

Directory Integration

Allows Identity users to be synced from third-party directories such as Microsoft Entra and LDAP.

• Integrate with Microsoft Entra, Active Directory, Google Secure LDAP, LDAP, or JumpCloud LDAP.
• See the Integration Help Center article for more information.

Custom Certificates

Upload and use a custom TLS certificate for UniFi OS web management access.

Custom certificate support for the Hotspot Portal is planned for a future release.

Border Gateway Protocol

Sets up BGP neighbors with other gateways and distributes routing information.

• Configure BGP by uploading a configuration text file in FRR format.
• See the BGP Help Center article for more information.

Bundled application

• UniFi Network 8.6.9

Improvements

• Added support for BGP (Border Gateway Protocol).
• Added support for Hotspot 2.0/PassPoint.
• Added support for Directory Integration for Identity Standard, sync your users from Microsoft Entra ID, Active Directory, Google Secure LDAP, LDAP, or JumpCloud LDAP.
• Added support for uploading custom certificates to UniFi OS.
• Support for the Guest Portal is planned to be available in future releases.
• Added support for custom SMTP servers for notifications.
• Added System Log events for unexpected shutdowns.
• Added support for NetFlow. Learn More
• Added support for Packet Captures. Learn More
• Added support for IPv6 Traffic Identification.
• Added support for IPv6 DNS shield.
• Added support for showing IP addresses for Admin Changes in System Logs for remote connections.
• Added support for sending country restriction events to remote syslog servers.
• Support for Network Application System Logs will be available in a future Network Application release.
• Added disk warnings to the Updates tab in Control Plane.
• Added support for Camera Sharing through the Identity app.
• Added support for sending Threat/Ad Block detections to Remote Syslog servers.
• Improved the storage reformat process user experience.
• Improved compatibility with third-party SFP modules.
• Improved WAN resiliency when changing from DHCP to PPPoE.
• Improved Remote Access and backup restore resiliency.
• Improved performance.
• Improved setup resiliency when NTP servers are unavailable.
• Improved DNS Shield resiliency.
• Improved WAN resiliency when RAs are not available in the DHCPv6 environment.
• Improved the user experience when restoring backups.
• Improved the device's system description for SNMP.
• Improved the setup user experience.
• Updated Traffic Identification signatures.
• Renamed UniFi OS Settings to UniFi OS Control plane, previously only visible via Site Manager.

Bugfixes

• Fixed incorrect packet loss reporting when WAN2 is not used.
• Fixed incorrect storage status in rare cases.
• Fixed log spam due to multipath routes.
• Fixed the inability to download backups when Remote Access is disabled.
• Fixed an issue where the second PSU could be reported as offline despite it working fine.

UniFi OS 4.1.9 adds support for Directory Integration, Custom Certificates, BGP, NetFlow, and Packet Captures.

Directory Integration

Allows Identity users to be synced from third-party directories such as Microsoft Entra and LDAP.

• Integrate with Microsoft Entra, Active Directory, Google Secure LDAP, LDAP, or JumpCloud LDAP.
• See the Integration Help Center article for more information.

Custom Certificates

Upload and use a custom TLS certificate for UniFi OS web management access.

Custom certificate support for the Hotspot Portal is planned for a future release.

Border Gateway Protocol

Sets up BGP neighbors with other gateways and distributes routing information.

• Configure BGP by uploading a configuration text file in FRR format.
• See the BGP Help Center article for more information.

Bundled application

• UniFi Network 8.5.6

Improvements

• Added support for BGP (Border Gateway Protocol).
• Added support for Hotspot 2.0/PassPoint.
• Added support for Directory Integration for Identity Standard, sync your users from Microsoft Entra ID, Active Directory, Google Secure LDAP, LDAP, or JumpCloud LDAP.
• Added support for uploading custom certificates to UniFi OS.
• Support for the Guest Portal is planned to be available in future releases.
• Added support for custom SMTP servers for notifications.
• Added System Log events for unexpected shutdowns.
• Added support for NetFlow. Learn More
• Added support for Packet Captures. Learn More
• Added support for IPv6 Traffic Identification.
• Added support for IPv6 DNS shield.
• Added support for showing IP addresses for Admin Changes in System Logs for remote connections.
• Added support for sending country restriction events to remote syslog servers.
• Support for Network Application System Logs will be available in a future Network Application release.
• Added disk warnings to the Updates tab in Control Plane.
• Added support for Camera Sharing through the Identity app.
• Added support for sending Threat/Ad Block detections to Remote Syslog servers.
• Improved the storage reformat process user experience.
• Improved compatibility with third-party SFP modules.
• Improved WAN resiliency when changing from DHCP to PPPoE.
• Improved Remote Access and backup restore resiliency.
• Improved performance.
• Improved setup resiliency when NTP servers are unavailable.
• Improved DNS Shield resiliency.
• Improved WAN resiliency when RAs are not available in the DHCPv6 environment.
• Improved the user experience when restoring backups.
• Improved the device's system description for SNMP.
• Improved the setup user experience.
• Updated Traffic Identification signatures.
• Renamed UniFi OS Settings to UniFi OS Control plane, previously only visible via Site Manager.

Bugfixes

• Fixed incorrect packet loss reporting when WAN2 is not used.
• Fixed incorrect storage status in rare cases.
• Fixed log spam due to multipath routes.
• Fixed the inability to download backups when Remote Access is disabled.
• Fixed an issue where the second PSU could be reported as offline despite it working fine.

UniFi OS 4.0.20 includes the improvements and bugfixes listed below.

Bundled application

• UniFi Network 8.3.32

Improvements

• Improved Remote Access connection resiliency.
• Improved username validation when creating a UI Account through the setup wizard.
• Improved compatibility with some 3rd party SFP modules.
• Improved device stability.
• Improved the DHCP Server response time on large setups.

Bugfixes

• Fixed gateway configuration issues in rare cases.
• Fixed incorrect elapsed time when restoring backups.
• Fixed an issue where remote logging stops working in rare cases.
• Fixed RADIUS issues when a username contains a space.
• Fixed PPPoE connection issues in rare cases.
• Fixed an issue where you couldn't completely delete all characters when configuring the WiFi name in the setup wizard.
• Fixed an issue where the WiFi channel and width changed after an RF scan.

UniFi OS 4.0.6 adds support for VLAN Magic, SNMP and includes the improvements and bugfixes listed below.

Bundled application

• UniFi Network 8.2.93

Improvements

• Added support for VLAN Magic.
• Added support for IPv6 addresses for the local portal.
• Added owner transfers to System logs.
• Added Identity Standard System Logs.
• Added ability to format the SD-card storage when performing a factory reset.
• Added system logs when admins reboot the gateway.
• Added SNMP support.
• Allow Full Management users to trigger firmware updates.
• Allow importing users with email via CSV files.
• Allow removing and deactivating users/admins when Identity is deactivated.
• Allow using Identity when Remote Access is disabled.
• Improved speed test accuracy.
• Improved UniFi OS Backup restore user experience.
• Improved admin/user removal/de-activation user experience.
• Improved various pages on the device's built-in screen.
• Improved UniFi OS resiliency.
• Improved downloading support files.
• Improved PPPoE stability.
• Improved DHCP Lease accuracy.
• Improved initial user list loading speed.
• Improved WiFi stability.
• Improved internet status checks.
• Improved storage resiliency.
• Improved UniFi Identity user experience.
• Improved RF Scanning resiliency.
• Improved the stability of WireGuard VPN when using FQDN as the server address.
• Improved resiliency for leasing Fixed IPs to clients.
• Improved the efficiency of initializing IDS/IPS.
• Improved application installation resiliency.
• Skip password change notifications when enabling SSH.
• Wake up the touchscreen during night mode when there is an active user session.
• Don't automatically enable One-Click WiFi when activating Identity.
• Don't show One-Click VPN/WiFi when the service is disabled.
• Removed weak MAC Algorithms for SSH connections.
• UniFi OS won't automatically adjust the timezone after an IP address change.
• Users/Groups now automatically get an invitation after assigning resources to them.
• Increased concurrent DNS queries for ad blocking and content filtering.
• Updated Traffic Identification signatures.

Bugfixes

• Fixed high CPU usage due to dnsmasq or Honeypot.
• Fixed a rare memory leak issue.
• Fixed gateway configuration issues when using OSPF.
• Fixed an issue where Auto Update settings weren't restored after restoring a backup.
• Fixed an issue where re-activated admins couldn't reach the gateway through the Site Manager.
• Fixed rare deadlock issues while using Traffic Identification.
• Fixed an issue where MAC override doesn't work for some MAC addresses.
• Fixed an rare case where PPPoE throughput was lower without using 0 for Smart Queues.
• Fixed an issue where YouTube history didn't work while using Ad Blocking.
• Fixed rare UniFi OS crash.
• Fixed an issue where applications could get stuck in the "install/uninstall queue" state in rare cases.
• Fixed an issue where the default route could be missing in rare cases.
• Fixed firewall rule creation issue when multiple ports are specified.
• Fixed an issue where the WAN MAC address couldn’t be set back to the default one.
• Fixed missing Traffic Identification statistics in larger deployments.
• Fixed Traffic Identification crashes and memory leaks.