CVE-2026-34910
Ubiquiti UniFi OS Improper Input Validation Vulnerability
CVSS
—
No CVSS
EPSS
78.6%
p100
KEV
YES
Jun 23, 2026
Exploit Today
80
0-100
Published: — · Last modified: —
Product
Ubiquiti / UniFi OS
Vulnerability
Ubiquiti UniFi OS Improper Input Validation Vulnerability
Added to KEV
Jun 23, 2026
Remediate by
Jun 26, 2026
Known ransomware use
No
Summary 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.
Notes
https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-34910