June 23, 2026 · Applied Cybernetics Group
CVE-2026-34910 — Ubiquiti UniFi OS
Ubiquiti UniFi OS Improper Input Validation Vulnerability
- Added to KEV
2026-06-23- Federal due date
2026-06-26- Vendor
- Ubiquiti
- Product
- UniFi OS
- EPSS
- 99.5th percentile (score 0.786, as of
2026-07-13) - NVD CVSS v3.1
- 10 (CRITICAL)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-34910
CISA short description
Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection.
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.
NVD 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.