CVE-2026-77540: critical vulnerability in Ubiquiti Inc UniFi OS Server
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 1.3%
A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS Server to execute a Command Injection on the host device.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
Ubiquiti Inc · UniFi OS ServerRelated CVEs — Ubiquiti Inc UniFi OS Server
In the same product, most dangerous first.