Improper Access Control Vulnerability in UniFi OS by Ubiquiti
CVE-2026-77536

9.9CRITICAL

Key Information:

Vendor

Ubiquiti Inc

Status
Unifi Os Server
Cloud Keys
Network Video Recorders
Enterprise Network Video Recorders
Vendor
CVE Published:
26 August 2026

What is CVE-2026-77536?

A vulnerability exists in UniFi OS that allows a low-privileged malicious actor with network access to exploit improper access control measures. Successfully exploiting this vulnerability could enable the attacker to escalate their privileges within the UniFi OS environment, potentially leading to unauthorized access and control over the device or instances running this operating system.

Affected Version(s)

Cloud Gateways 0 < 5.1.31

Cloud Keys 0 < 5.1.31

Dream Machines 0 < 5.1.31

References

https://community.ui.com/releases/Security-Advisory-Bulle...

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.