CVE-2026-21638
Remote Code Execution in Ubiquiti airMAX Wireless Protocol
Publication date: 2026-01-08
Last updated on: 2026-01-08
Assigner: HackerOne
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| ubiquiti | ubb-xg | to 1.2.2 (exc) |
| ubiquiti | udb-pro | to 1.4.1 (exc) |
| ubiquiti | ubb | to 3.1.5 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-77 | The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability allows a malicious actor within Wi-Fi range to exploit a flaw in the airMAX Wireless Protocol used by certain Ubiquiti products, enabling them to execute remote code on the affected device without any user interaction or privileges.
How can this vulnerability impact me? :
An attacker exploiting this vulnerability could gain control over the affected device remotely, potentially leading to unauthorized access, disruption of service, data compromise, or further attacks within the network.
What immediate steps should I take to mitigate this vulnerability?
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.