CVE-2026-21638

HIGH

UI Ubb-xg Firmware < 1.2.3 - Command Injection

Title source: rule
STIX 2.1

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. Affected Products: UBB-XG (Version 1.2.2 and earlier) UDB-Pro/UDB-Pro-Sector (Version 1.4.1 and earlier) UBB (Version 3.1.5 and earlier) Mitigation: Update your UBB-XG to Version 1.2.3 or later. Update your UDB-Pro/UDB-Pro-Sector to Version 1.4.2 or later. Update your UBB to Version 3.1.7 or later.

Scores

CVSS v3 8.8
EPSS 0.0038
EPSS Percentile 29.9%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-77
Status published
Products (4)
ui/ubb-xg_firmware < 1.2.3
ui/ubb_firmware < 3.1.7
ui/udb-pro-sector_firmware < 1.4.2
ui/udb-pro_firmware < 1.4.2
Published Jan 08, 2026
Tracked Since Feb 18, 2026