CVE-2026-54402: CWE-20 Improper Input Validation in Ubiquiti Inc UniFi OS Server
A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.
AI Analysis
Technical Summary
This vulnerability in UniFi OS Server involves improper input validation (CWE-20) that enables a malicious actor with network access and low privileges to execute arbitrary commands on the host system via command injection. The vulnerability is rated critical with a CVSS 3.1 base score of 9.9, reflecting network attack vector, low attack complexity, no user interaction, and complete impact on confidentiality, integrity, and availability. No official remediation or patch information is currently available, and no affected versions are explicitly stated.
Potential Impact
Successful exploitation could lead to full compromise of the affected UniFi OS Server host, including unauthorized command execution, complete loss of confidentiality, integrity, and availability of the system. This could enable attackers to control the device, disrupt services, or access sensitive information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict network access to UniFi OS Server devices to trusted users only and monitor for suspicious activity related to command execution attempts.
CVE-2026-54402: CWE-20 Improper Input Validation in Ubiquiti Inc UniFi OS Server
Description
A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.
CVSS v3.1
Score 9.9critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in UniFi OS Server involves improper input validation (CWE-20) that enables a malicious actor with network access and low privileges to execute arbitrary commands on the host system via command injection. The vulnerability is rated critical with a CVSS 3.1 base score of 9.9, reflecting network attack vector, low attack complexity, no user interaction, and complete impact on confidentiality, integrity, and availability. No official remediation or patch information is currently available, and no affected versions are explicitly stated.
Potential Impact
Successful exploitation could lead to full compromise of the affected UniFi OS Server host, including unauthorized command execution, complete loss of confidentiality, integrity, and availability of the system. This could enable attackers to control the device, disrupt services, or access sensitive information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict network access to UniFi OS Server devices to trusted users only and monitor for suspicious activity related to command execution attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hackerone
- Date Reserved
- 2026-06-13T15:00:00.604Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a46823927e9c797199030bb
Added to database: 07/02/2026, 15:22:33 UTC
Last enriched: 07/02/2026, 15:40:32 UTC
Last updated: 07/03/2026, 00:23:52 UTC
Views: 8
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