High severity · published Jan 8, 2026
CVE-2026-21638
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…
8.8
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UF
Ubb Firmware · UI
before 3.1.7 · source: NVD
UF
Ubb-xg Firmware · UI
before 1.2.3 · source: NVD
UF
Udb-pro Firmware · UI
before 1.4.2 · source: NVD
UF
Udb-pro-sector Firmware · UI
before 1.4.2 · source: NVD