ACTIVELY EXPLOITED
CVE-2026-34910: Ubiquiti UniFi OS Improper Input Validation Vulnerability
| Vendor | Ubiquiti |
|---|---|
| Product | UniFi OS |
| Actively exploited | Yes |
| Added to CISA KEV | 23 Jun 2026 |
| CISA federal deadline | 26 Jun 2026 |
| Weakness (CWE) | CWE-20 |
Required action (CISA's text)
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.
Description (NVD)
Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection.
SOURCES
Other Ubiquiti flaws
- CVE-2026-34909: Ubiquiti UniFi OS Path Traversal Vulnerability
- CVE-2026-34908: Ubiquiti UniFi OS Improper Access Control Vulnerability
- CVE-2010-5330: Ubiquiti AirOS Command Injection Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.