What’s Vulnerable › Vulnerabilities
CVE-2026-21638
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-01-08 · updated 2026-06-17
- Weakness: CWE-77
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.
Affected products
- Ui Ubb-Xg Firmware: before 1.2.3 — fixed in 1.2.3
- Ui Ubb Firmware: before 3.1.7 — fixed in 3.1.7
- Ui Udb-Pro-Sector Firmware: before 1.4.2 — fixed in 1.4.2
- Ui Udb-Pro Firmware: before 1.4.2 — fixed in 1.4.2
How to fix
Upgrade to a fixed version: 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. Check the vendor advisory for mitigations.
References
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