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CVE-2026-34910

CRITICAL10.0
CISA KEV

Published 2026-05-22 · Updated 2026-06-17 · Source support@hackerone.com

Description

A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE-20

CISA Known-Exploited Vulnerability

Product: UbiquitiUniFi OS

Name: Ubiquiti UniFi OS Improper Input Validation Vulnerability

Date added: 2026-06-23 · Due: 2026-06-26

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

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