---
cve: "CVE-2026-21638"
severity: "HIGH"
cvss: 8.8
epss: "0.4%"
vendor: "Ubiquiti Inc"
kev: false
exploited: false
published: "2026-01-08 17:15:50"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T00:03:45+02:00"
---

# CVE-2026-21638

> 8.8 HIGH

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://community.ui.com/releases/Security-Advisory-Bulletin-060-060/cde18da7-2bc4-41bb-a9cc-48a4a4c479c1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-21638) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_