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CVE-2025-52665

UI Unifi Access authentication bypass

10.0 CRITICALEPSS 41.1%
  1. Published30 Oct 2025

Description

A malicious actor with access to the management network could exploit a misconfiguration in UniFi’s door access application, UniFi Access, that exposed a management API without proper authentication. This vulnerability was introduced in Version 3.3.22 and was fixed in Version 4.0.21 and later.  Affected Products: UniFi Access Application (Version 3.3.22 through 3.4.31). 
 Mitigation: Update your UniFi Access Application to Version 4.0.21 or later.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

UI Unifi Access≥ 3.3.22 < 4.0.21

Remediation

Fixed in
UI Unifi Access≥ 4.0.21

References

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Frequently asked

Is CVE-2025-52665 being actively exploited?

CVE-2025-52665 is not in the CISA KEV catalog. Its EPSS exploit probability is 41.1%.

How severe is CVE-2025-52665?

CVE-2025-52665 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 41.1% probability of exploitation.

Which products are affected by CVE-2025-52665?

Affected products include UI Unifi Access.

How do I fix CVE-2025-52665?

Upgrade affected software to a fixed version, for example UI Unifi Access 4.0.21 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-52665 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.