CVE-2026-77550 — CRITICAL (10.0)

Vulnerability 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.

CVSS Score

10.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-93

References

https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4

FAQ

What is CVE-2026-77550?

CVE-2026-77550 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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 O...

How severe is CVE-2026-77550?

CVE-2026-77550 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-77550?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.