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

• 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.

• Improved reporting to Site Manager.

• Improved ownership transfers with a clearer pending status.

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

• Improved system reliability.

• Improved mDNS stability.

• Improved application installation resiliency.

• Improved WAN SLA reliability.

• Improved Shadow Mode resiliency.

• Improved UniFi OS backup restore reliability.

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

• 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.

• Upgraded the Debian distribution to Trixie.

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 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 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 Deep Inspection domain category updates could cause the device to run out of memory and restart.

• Fixed an issue where Shadow Mode setup could fail after a temporary connection loss to the primary console.

• 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.

• Fixed an issue where a Shadow Mode gateway could fail to become active after a failover.

• 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 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 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 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.

• [EF-Core] Fixed missing Virtual Network Override options.

• [EFG] Fixed an issue where the console could become unresponsive after a WireGuard configuration change, requiring a power cycle.

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 5.1.31 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 5.1.30 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 5.1.27 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 hardware offloading.
• 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.

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 incorrect RX error counts on RJ45 ports.
• 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 that could cause high swap memory usage when using SSL Inspection.

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.

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.

UniFi OS 5.1.19 includes the improvements and bugfixes below.

Bundled application

• UniFi Network 10.4.57

Improvements

• Improved backup restore resiliency.

Bugfixes

• Fixed an issue where a false “No DNS IP Address” message could appear on the screen in rare cases.
• Fixed the security issues mentioned in Security Advisory Bulletin 066.

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.
• Improved SSL Inspection resiliency.

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.

This is the initial release for the EF-Core.

Bundled application

• UniFi Network 10.4.57

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.
• Added support for configuring FEC mode during setup on SFP28 ports.
• Allowed Super Admins to restore local backups.
• Improved the Alarm Manager user experience.
• Improved system stability.
• Improved backup restore resiliency.
• 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 SFP connectivity.
• Improved WireGuard connectivity resiliency.
• Improved compatibility with ISPs that require periodic ARP on the WAN.
• Improved the app restoration experience after a firmware update.
• Improved device discovery resiliency and overall stability.
• Improved DNS cache responsiveness.
• Improved firmware upgrade behavior by updating the Network Application to the latest official release after an upgrade.

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 PBR rules were not applied to egress traffic from NeXT AI.
• Fixed an issue where SNAT did not work properly when using NeXT AI.
• Fixed an issue where certificates were renewed daily.
• Fixed an issue where the application status could be incorrect.
• 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.
• Added support for configuring FEC mode during setup on SFP28 ports.
• Allowed Super Admins to restore local backups.
• Improved the Alarm Manager user experience.
• Improved system stability.
• Improved backup restore resiliency.
• 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 SFP connectivity.
• Improved WireGuard connectivity resiliency.
• Improved compatibility with ISPs that require periodic ARP on the WAN.
• Improved the app restoration experience after a firmware update.
• Improved device discovery resiliency and overall stability.
• Improved DNS cache responsiveness.
• Improved firmware upgrade behavior by updating the Network Application to the latest official release after an upgrade.

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 PBR rules were not applied to egress traffic from NeXT AI.
• Fixed an issue where SNAT did not work properly when using NeXT AI.
• Fixed an issue where certificates were renewed daily.
• Fixed an issue where the application status could be incorrect.
• 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 Shadow Mode resiliency.
• Improved Web UI Stability and performance.
• Improved the Alarm Manager user experience and resiliency.
• Improved system stability.
• Improved Link Aggregation stability.
• Improved WAN throughput reporting when having more than 2 WAN interfaces.
• Improved Speed Test stability.
• Updated Traffic Identification signatures.
• [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 Bing search language anomalies in Deep Inspection.
• 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 Site Magic remote peer address was not restored in 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.
• Fixed SFP connection issues when using fixed speeds.