CVE-2026-33000
A critical vulnerability in UniFi OS devices allows attackers with network access and high privileges to run arbitrary commands. The flaw is due to improper input validation that can be exploited for command injection. This could let an attacker take full control of the affected device.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
UniFi OS devices (CPE: ui unifi_os_server).
Real-world impact
An attacker who can reach the device over the network and has high privileges could execute any command on the device, potentially taking full control, exfiltrating data, or disrupting network services.
Why this severity
The CVSS score of 9.1 reflects that the vulnerability is exploitable over the network (AV:N), requires low effort (AC:L), needs high privileges (PR:H), does not need user interaction (UI:N), is a complete compromise (S:C), and can lead to full confidentiality, integrity, and availability loss (C:H/I:H/A:H).
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- May 22, 2026 · May 22, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 23, 2026 · 12d agoAdvisory updatedThe NVD record was last revised.
How it’s attacked
References & advisories
- community.ui.com/releases/Security-Advisory-…patchvendor advisory