Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-21638

Severity CVSS v4.0:
Pending analysis
Type:
CWE-77 Command Injection
Publication date:
08/01/2026
Last modified:
08/01/2026

Description

A malicious actor in Wi-Fi range of the affected product could leverage a vulnerability in the airMAX Wireless Protocol to achieve a remote code execution (RCE) within the affected product.<br /> <br /> <br /> Affected Products:<br /> UBB-XG (Version 1.2.2 and earlier) <br /> UDB-Pro/UDB-Pro-Sector (Version 1.4.1 and earlier) <br /> UBB (Version 3.1.5 and earlier) <br /> <br /> Mitigation:<br /> Update your UBB-XG to Version 1.2.3 or later.<br /> Update your UDB-Pro/UDB-Pro-Sector to Version 1.4.2 or later.<br /> Update your UBB to Version 3.1.7 or later.

Impact

Vector 3.x
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
8.80
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools