CVE-2026-77536
Deferred Deferred - Pending Action

Improper Access Control in UniFi OS Devices

Vulnerability report for CVE-2026-77536, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-08-26

Last updated on: 2026-08-27

Assigner: fe490ce8-0395-4072-90d8-2707e1bdf984

Description

A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.

CVSS Scores

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Meta Information

Published
2026-08-26
Last Modified
2026-08-27
Generated
2026-09-16
AI Q&A
2026-08-26
EPSS Evaluated
2026-09-14
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ubiquiti unifi_os *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

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Executive Summary

This vulnerability is an Improper Access Control issue in UniFi OS devices. A malicious actor with network access and low privileges can exploit it to escalate their privileges within the UniFi OS environment.

Detection Guidance

Detection requires checking UniFi OS devices for improper access control issues. Review device logs for unusual privilege escalation attempts or unauthorized access. Verify user permissions and access levels across UniFi OS instances. No specific commands are provided in the available context.

Impact Analysis

An attacker could gain higher privileges, potentially allowing them to take control of UniFi OS devices or instances, leading to unauthorized access, data manipulation, or disruption of services.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized privilege escalation, which may lead to unauthorized access to sensitive data. Improper access control risks exposing personal or health information, violating confidentiality requirements under these regulations.

Mitigation Strategies

Update UniFi OS devices to the latest patched version immediately. Restrict network access to UniFi OS devices to trusted users only. Review and audit user privileges to ensure least privilege access. Monitor network traffic for unusual activity or privilege escalation attempts.

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