Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since June 23, 2026.
CVE-2026-34910
Ubiquiti UniFi OS Improper Input Validation Vulnerability
Added to KEV June 23, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-34910
- CWE
- CWE-20
- Affected products
- UniFi OS · Ubiquiti UniFi OS · Ubiquiti
What happened
Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection.
What it means for your business
Ubiquiti UniFi OS is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-34910). Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection. CISA remediation due date: 2026-06-26. If you need help checking exposure, call (864) 335-9223.
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.
CISA due date: June 26, 2026
Sources
Related briefs
Ubiquiti UniFi OS Path Traversal Vulnerability
Ubiquiti UniFi OS is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-34909). Ubiquiti UniFi OS contains a path traversal vulnerability which could allow a malicious actor with access to the network to access files on the underlying system that could be manipulated to access an underlying account. CISA remediation due date: 2026-06-26. If you need help checking exposure, call (864) 335-9223.
Ubiquiti UniFi OS Improper Access Control Vulnerability
Ubiquiti UniFi OS is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-34908). Ubiquiti UniFi OS contains an improper access control vulnerability which could allow a malicious actor with access to the network to make unauthorized changes to the system. CISA remediation due date: 2026-06-26. If you need help checking exposure, call (864) 335-9223.
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