CVE-2026-33000
Critical
Description
A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.
SeverityCritical
CVSS9.1
Exploit probability—
ProductUi Unifi Os Server
PublishedMay 22, 2026
First seenMay 22, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- ui unifi_os_server5.0.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ui unifi_os_server | v < 5.0.8 | 5.0.8 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.