Improper Neutralization Vulnerability in UniFi OS by Ubiquiti
CVE-2026-77550

10CRITICAL

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-2026-77550?

A vulnerability in certain devices running UniFi OS allows a malicious actor with network access to exploit improper neutralization of CRLF sequences. This exploitation could enable the attacker to bypass authentication mechanisms, potentially granting unauthorized access to sensitive device instances. As a result, it is crucial for users and administrators to apply recommended security updates and patches provided by Ubiquiti to mitigate this risk.

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:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.