Actively exploited in the wild
Ubiquiti UniFi OS Improper Access Control Vulnerability
Ubiquiti - UniFi OS · Listed in the CISA KEV since 2026-06-23. This indicates confirmed attacks in production environments.
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.
CVE-2026-34908
CriticalCVSS 10.0KEVExploitation Probability (EPSS)
High risk83th percentile - higher than 83% of all known CVEs
Summary
Improper Access Control vulnerability in UniFi OS devices. An attacker with network access can make unauthorized changes to the system.
Risk Assessment
An attacker can change device configuration, disable security features, or access sensitive data.
Recommendation
Apply firmware updates provided by the vendor. Restrict network access to trusted hosts only.
Original NVD description (English source)
A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.