UniFi OS 6.0.18 includes the improvements and bugfixes below.

Bundled

• UniFi Drive 4.4.30

• Identity Sync Service 1.8.8

Improvements

• Improved storage resiliency.

• Improved device stability.

• Revoked compromised eMudhra CA certificates.

Bugfixes

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

• Fixed a compatibility issue with 4Kn disks.

• Fixed an issue where a fast RAID rebuild could result in incorrect parity data.

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

• 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.

UniFi OS 6.0.17 includes the improvements and bugfixes below.

Bundled

• UniFi Drive 4.4.20

• Identity Sync Service 1.8.8

Improvements

• Improved storage resiliency after power loss.

• Improved device stability.

• Revoked compromised eMudhra CA certificates.

Bugfixes

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

• Fixed a compatibility issue with 4Kn disks.

• Fixed an issue where a fast RAID rebuild could result in incorrect parity data.

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

• 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.

Bundled

• UniFi Drive 4.4.9
• Identity Sync Service 1.8.5

Improvements

• Added on-demand file system repair for RAID-managed multi-drive storage when file system errors are detected.

• 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.

• Added bad block detection for storage pools.

  • For pools showing an “At Risk” status after the update, run data scrubbing to verify data integrity.

• Improved storage reliability and resiliency.

• Improved application installation resiliency.

• Improved ownership transfers with a clearer pending status.

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

• Improved system reliability.

• Improved UniFi OS backup restore reliability.

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

• Improved Bluetooth reliability during setup.

• Improved HDD RPM detection.

• Improved compatibility with Kingston KC3000 NVMe SSDs.

• Improved Application Rollback resiliency.

• Improved RAID initialization and management, including the ability to reformat uninitialized arrays.

• Improved time synchronization resiliency.

• Improved authentication reliability during two-factor challenges.

• Upgraded the Debian distribution to Trixie.

• [UNAS2/UNAS4] Improved device stability.

Bugfixes

• Fixed a rare issue where the fallback IP was not removed after the uplink DHCP server became available again.
• Fixed an issue where a false Storage Failed alarm could appear during RAID expansion.
• Fixed high memory usage during SSD cache removal.
• Fixed incorrect auto-negotiation information for aggregated ports.
• Fixed Alarm Manager emails for local administrators when Remote Access is disabled.
• [UNAS-Pro/UNAS-Pro-4/UNAS-Pro-8] Fixed a rare kernel crash.

Bundled

• UniFi Drive 4.3.10
• Identity Sync Service 1.8.4

Bugfixes

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

Bundled

• UniFi Drive 4.3.10
• Identity Sync Service 1.8.4

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 067.
• [UNAS-Pro-4/8] Fixed SFP link issues.

Bundled

• UniFi Drive 4.3.10
• Identity Sync Service 1.8.4

Improvements

• Updated bundled services/applications.

Bundled

• UniFi Drive 4.3.10
• Identity Sync Service 1.8.3

Improvements

• Improved device stability.

Bundled Application

• UniFi Drive 4.2.6

Improvements

• Improved device stability.

Bundled Application

• UniFi Drive 4.2.6

Improvements

• Improved device stability.
• [UNAS-Pro-4] Improved SFP compatibility.

Bundled Application

• UniFi Drive 4.2.6

Improvements

• Improved system stability.

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.

UniFi OS 5.1.19 includes the improvements and bugfixes below.

Bundled Application

• UniFi Drive 4.2.6

Improvements

• Improved backup restore resiliency.
• Improved system stability.

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 066.

Bundled Application

• UniFi Drive 4.2.2

Improvements

• Improved resiliency when formatting USB shares.
• Improved system stability.
• Improved storage creation and removal resiliency.
• Improved NFS and SMB resiliency.
• [UNAS2/UNAS4] Improved the screen user experience when shutting down the device.

Bugfixes

• Fixed the inability to use Photo Backup through UniFi Endpoints after a console reboot.
• Fixed the security issues mentioned in Security Advisory Bulletin 065.

Bundled Application

• UniFi Drive 4.2.2

Improvements

• Improved system stability.
• Improved storage creation and removal resiliency.
• Improved NFS and SMB resiliency.
• [UNAS2/UNAS4] Improved the screen user experience when shutting down the device.

Bundled Application

• UniFi Drive 4.1.16

Improvements

• Improved the app restoration experience after a firmware update.
• Improved compatibility with Samsung 870 EVO and Samsung PM863a SSDs.
• Improved storage pool status reporting.
• [UNAS4] Improved SATA link reliability.

Bugfixes

• Fixed the security issues mentioned in Security Advisory Bulletin 064.
• Fixed an issue where application auto-updates could fail after a firmware update.
• [UNAS4] Fixed an out-of-memory issue when removing a pool with a read/write cache.

Bundled Application

• UniFi Drive 4.1.16

Improvements

• Added support for RAID scrubbing.
• Requires UniFi Drive 4.2 or newer.
• Added a fallback IP mechanism for aggregated ports.
• Added support for automatic Let’s Encrypt certificate.
• Improved firmware upgrade behavior by updating the Drive Application to the latest official release after an upgrade.
• Improved RAID10 reliability.
• Improved system stability.
• Improved backup restore resiliency.
• Improved the storage management user experience.
• Improved compatibility with Crucial BX500 SSD.
• Improved reconnection speed to Site Manager after a firmware update.
• Improved NVMe SSD cache reliability.
• Improved storage mounting resiliency.
• Improved hot-plug disk resiliency.
• Improved compatibility with Kingston XS1000.

Bugfixes

• Fixed an issue where storage capacity did not expand after RAID expansion in rare cases.
• Fixed an issue where hot spare disks did not activate to repair the RAID when it became degraded in rare cases.
• Fixed an issue where storage pool removal could fail in rare cases.
• Fixed SMB permission issues when moving files from USB Drives through the Drive Application.

Bundled Application

• UniFi Drive 4.0.12

Improvements

• Improved system stability.
• [UNAS2/UNAS4] Improved network stability.

Bugfixes

• Fixed an issue where Aggregation interfaces could get a random MAC address after a reboot.
• [UNAS-Pro-4] Fixed an issue where the storage space didn't expand after inserting a new hard drive.

UniFi OS 5.0.12 includes the improvements and bugfixes listed below.

Bundled Application

• UniFi Drive 3.4.5

Improvements

• Added time/date mismatch toast messages.
• Improved the Internet connectivity check.
• Improved the backup and restore resiliency.
• Improved certificate file validation.
• Improved Web UI Stability and performance.
• Improved the Alarm Manager user experience and resiliency
• Improved system stability.
• Improved NFS and SMB stability under heavy traffic load.
• [UNAS2] Improved storage usage and capacity reporting.
• [UNAS2] Improved reliability of the USB port.
• [UNAS-Pro-8] Improved NVMe SSD cache resiliency.
• [UNAS-Pro-8] Improved Link Aggregation status reporting.

Bugfixes

• Fixed an issue where incorrect suggestions could be shown when disks are At Risk.
• [UNAS-Pro-8] Fixed incorrect MAC Address for Link Aggregation interfaces.
• [UNAS-Pro/UNAS-Pro-8] Fixed an issue where the RJ45 port couldn't link with 100MbE peer devices using auto-negotiation.

UniFi OS 4.4.11 includes the improvements and bugfix listed below.

Bundled Application

• UniFi Drive 3.3.10

Improvements

• Added support for Samba Active Directory (AD).
• Improved storage reliability.
• Improved storage pool creation resiliency.

Bugfixes

• Fixed Samba connection issues.

UniFi OS 4.4.4 includes the improvements listed below.

Bundled Application

• UniFi Drive 3.2.10

Bugfixes

• Improved Remote Access connection resiliency.
• Improved HDD detection for WDC WD10EACS-07D6B1 and WD20EARS-00MVWB0.

UniFi OS 4.4.2 includes the improvements and bugfixes listed below.

Bundled Application

• UniFi Drive 3.2.6

Improvements

• Improved RAID compatibility reporting when the smallest disk in the array creates issues.
• Improved system stability.
• Improved stability when encountering unknown storage layouts.
• Improved storage mounting resiliency.

Bugfixes

• Fixed an issue where storage didn't expand in rare cases after adding a new disk to a RAID1 array.
• Fixed an issue where the RAID assembly could fail after an interrupted RAID5-to-RAID6 expansion.
• Fixed an issue where SSDs could incorrectly show an end-of-life status when the drive hadn't reached its lifespan yet.
• Fixed an issue where newly created storage volumes intermittently reported risky health states.
• Fixed an issue where the system didn't reboot after triggering a firmware update.