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Vulnerability record · CVE-2026-77549 · published 26 August 2026

CVE-2026-77549: A malicious actor with access to the network and under certain conditions could exploit an Improper Neutraliza…

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.

9.0 CVSS 3.1 Critical EPSS 0.51% · top 58.7% CWE-93 · CWE-93 Deferred
9.0CVSS 3.1 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
28 Aug 2026Last modified by NVD

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.

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

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-77549), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.