PatchSiren cyber security CVE debrief

CVE-2026-47369 Ubiquiti Inc CVE debrief

CVE-2026-47369 is a critical vulnerability with a CVSS score of 9.9, affecting certain devices running UniFi OS. The vulnerability is caused by an Improper Input Validation issue, which allows a malicious actor with access to the network and low privileges to escalate privileges within UniFi OS devices or instances. The vulnerability was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-47369) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-47369).

Vendor: Ubiquiti Inc
Product: UniFi OS Server
CVSS: CRITICAL 9.9
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-12
Original CVE updated: 2026-06-12
Advisory published: 2026-06-12
Advisory updated: 2026-06-12

Who should care

Administrators and users of UniFi OS devices should be aware of this vulnerability and take necessary steps to mitigate it.

Technical summary

The vulnerability is caused by an Improper Input Validation issue in UniFi OS devices. This allows a malicious actor with access to the network and low privileges to escalate privileges within UniFi OS devices or instances. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Defensive priority

High

Recommended defensive actions

Apply patches or updates provided by the vendor as soon as possible.
Restrict access to UniFi OS devices to only necessary personnel.
Monitor network activity for suspicious behavior.

Evidence notes

The vendor and product information is currently unknown, but it is believed to be related to Ui.

Official resources

CVE-2026-47369 was published on 2026-06-12T04:17:06.513Z and last modified on 2026-06-12T16:10:10.070Z.