Remote Code Execution Vulnerability in airMAX Wireless Protocol by Ubiquiti
CVE-2026-21638

8.8HIGH

Key Information:

Vendor

Ubiquiti Inc

Status
Ubb-xg
Udb-pro/udb-pro-sector
Ubb
Vendor
CVE Published:
8 January 2026

What is CVE-2026-21638?

A vulnerability exposed in the airMAX Wireless Protocol could allow a malicious actor within Wi-Fi range to execute arbitrary code on affected Ubiquiti devices. This issue impacts various models including UBB-XG, UDB-Pro, UDB-Pro-Sector, and UBB, posing significant security risks. Users are strongly advised to update their devices to the latest versions to mitigate this vulnerability and safeguard their networks.

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Affected Version(s)

UBB 0 < 3.1.7

UBB-XG 0 < 1.2.3

UDB-Pro/UDB-Pro-Sector 0 < 1.4.2

References

https://community.ui.com/releases/Security-Advisory-Bulle...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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