CVE-2026-77549

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77549
StatePUBLISHED
AssignerUbiquiti
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-26 11:16:38 UTC
Updated2026-08-28 18:49:15 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 9 CRITICAL from fe490ce8-0395-4072-90d8-2707e1bdf984

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

EPSS: 0.003000000 probability, percentile 0.222230000 (date 2026-08-30)

Problem Types: CWE-93 | CWE-93 CWE-93 Improper neutralization of CRLF sequences ('CRLF injection')

VersionSourceTypeScoreSeverityVector
3.1fe490ce8-0395-4072-90d8-2707e1bdf984Secondary9CRITICALCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1CNACVSS9CRITICALCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ubiquiti Inc UniFi OS Server affected 5.1.37 semver Not specified
CNA Ubiquiti Inc Cloud Keys affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Network Video Recorders affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Enterprise Network Video Recorders affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Enterprise Network Attached Storage affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Dream Machines affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Enterprise Firewall Core affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Dream Routers affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Enterprise Fortress Gateway affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Cloud Gateways affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Dream Wall affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Express 7 affected 5.1.31 semver Not specified
CNA Ubiquiti Inc Network Attached Storage affected 5.1.32 semver Not specified
CNA Ubiquiti Inc Express affected 4.0.17 semver Not specified

References

ReferenceSourceLinkTags
community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8b... fe490ce8-0395-4072-90d8-2707e1bdf984 community.ui.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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