Improper Neutralization Vulnerability in UniFi OS by Ubiquiti
CVE-2026-77549

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-2026-77549?

A vulnerability in Ubiquiti's UniFi OS allows a malicious actor with network access to exploit improper neutralization of CRLF sequences. This exploitation can potentially lead to an authentication bypass, enabling unauthorized access to affected devices.

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.