CVE-2026-77549 - Vulnerability Details - OpenCVE

A malicious actor with access to the network and under certain conditions could exploit an Improper Neutralization of CRLF Sequences vulnerability found in certain devices running UniFi OS to bypass authentication to such UniFi OS devices or instances.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

No data.

No data.

No data.

References

Link	Providers
https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9

History

Wed, 26 Aug 2026 13:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Wed, 26 Aug 2026 13:15:00 +0000

Type	Values Removed	Values Added
Title		UniFi OS Improper CRLF Neutralization Enables Authentication Bypass

Wed, 26 Aug 2026 11:00:00 +0000

Type	Values Removed	Values Added
Description		A malicious actor with access to the network and under certain conditions could exploit an Improper Neutralization of CRLF Sequences vulnerability found in certain devices running UniFi OS to bypass authentication to such UniFi OS devices or instances.
Weaknesses		CWE-93
References		https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9
Metrics		cvssV3_1 `{'score': 9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H'}`

MITRE

Status: PUBLISHED

Assigner: Ubiquiti

Published: 2026-08-26T10:30:06.712Z

Updated: 2026-08-27T03:56:37.824Z

Reserved: 2026-08-20T20:32:37.794Z

Link: CVE-2026-77549

Vulnrichment

Updated: 2026-08-26T12:51:14.461Z

NVD

Status : Deferred

Published: 2026-08-26T11:16:38.807

Modified: 2026-08-28T18:49:15.340

Link: CVE-2026-77549

Redhat

No data.

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