CISA_KEV · JUNE 2026 · EARLY WARNING

Ubiquiti UniFi OS Vulnerability Under Investigation

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.

CVE-2026-34910Severity: HIGH

An early warning has been issued regarding a vulnerability in Ubiquiti UniFi OS that could allow command injection. This issue is currently under investigation.

What happened

According to the CISA Known Exploited Vulnerabilities Catalog, Ubiquiti UniFi OS reportedly contains an improper input validation vulnerability (tracked as CVE-2026-34910). This vulnerability could potentially allow a malicious actor with network access to conduct command injection attacks.

The severity of this issue is classified as HIGH. It is recommended that users upgrade to the latest version of Ubiquiti UniFi OS and implement strict network access controls to mitigate the risk of unauthorized access.

For more detailed information, please consult the primary sources listed. The specific versions affected and other technical details are currently under investigation. Users should stay updated with official announcements from Ubiquiti and CISA.

How 0Day mitigates this

MATCHED TO YOUR ACTUAL DEPENDENCY GRAPH0Day matches every incoming threat signal against your GitHub organization’s full dependency graph, including transitive dependencies. If ubiquiti_unifi_os is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.

Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.

Join the 0Day waitlist →

← Back to all threats