CVE-2026-77550

UniFi OS Authentication Bypass via CRLF Injection

Published Aug 26, 2026 CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
Description
A malicious actor with access to the network 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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title UniFi OS Authentication Bypass via CRLF Injection
Type Values Removed Values Added
Description A malicious actor with access to the network 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
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
Ubiquiti
Published
Updated
Aug 27, 2026, 3:56 AM
Reserved
Aug 20, 2026, 8:32 PM
Status
Deferred
Published
Aug 26, 2026, 11:16 AM
Modified
Aug 28, 2026, 6:49 PM