The current version of UniFi OS (UDM/UCG) is 5.1.26 (as of 29/07/2026). patchletter checks the official source daily and emails you new releases.
Actively exploited vulnerabilities
The US cybersecurity agency CISA lists these vulnerabilities in its catalog of Known Exploited Vulnerabilities. What CISA does not carry does not appear in this list — even where it is being exploited.
- CVE-2026-34908Ubiquiti UniFi OS Improper Access Control Vulnerability
10.0 critical · over the network, without login · CISA deadline was 26 Jun
- CVE-2026-34909Ubiquiti UniFi OS Path Traversal Vulnerability
10.0 critical · over the network, without login · CISA deadline was 26 Jun
- CVE-2026-34910Ubiquiti UniFi OS Improper Input Validation Vulnerability
10.0 critical · over the network, without login · CISA deadline was 26 Jun
Source: CISA KEV. The CVE is matched to the product automatically — when in doubt, the linked NVD entry applies.
UniFi OS (UDM/UCG) at a glance
UniFi OS is the platform on Ubiquiti's UniFi consoles (Dream Machine, Cloud Key, UNVR), hosting the Network, Protect and other applications. Ubiquiti ships UniFi OS updates plus updates to the hosted apps; both layers should stay current.
For admins UniFi OS bundles several services on one device, so updates touch the console firmware and the applications on it. Take a backup before larger updates, keep the console's management off the open internet, and — since Protect handles cameras and Network handles the LAN — apply security updates promptly. Roll updates in stages where you run multiple sites. After updating, verify camera streams, adoption and critical network policies. Track the UniFi OS version and its console's support status.
Version history & changelog · as detected by patchletter
| Version | Channel | Date | Notes |
|---|---|---|---|
| 5.1.26 | FIRMWARE | 29/07/2026 | Release notes → |
| 5.1.19 | FIRMWARE | 26/07/2026 | Release notes → |
Frequently asked questions
- What is the latest version of UniFi OS (UDM/UCG)?
- UniFi OS (UDM/UCG) 5.1.26, released 29/07/2026. patchletter checks the vendor's official source daily for new releases.
- Where can I find the UniFi OS (UDM/UCG) release notes?
- The version history above links to the vendor's official release notes where the vendor publishes them. patchletter deliberately stores no vendor full texts.
- How do I get notified about new UniFi OS (UDM/UCG) updates?
- Tick UniFi OS (UDM/UCG) off in the catalogue and leave your address. From then on new versions go out by email — one at a time, or bundled in the daily or weekly digest.
An email as soon as a new UniFi OS (UDM/UCG) version ships
We reconcile the vendor source daily. When a new version appears, it lands in your inbox right away or bundled as a digest. The update email is free and ends with one click. Alerts about vulnerabilities and end of support are part of patchletter Pro.
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[](https://patchletter.com/en/software/unifi-os)https://patchletter.com/badge/unifi-os.svgAlso available: ?v=eol (end of support) and ?v=cve (actively exploited).
