Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-21639

Severity CVSS v4.0:
Pending analysis
Type:
CWE-77 Command Injection
Publication date:
08/01/2026
Last modified:
14/01/2026

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.<br /> <br /> <br /> <br /> Affected Products:<br /> <br /> airMAX AC (Version 8.7.20 and earlier)<br /> airMAX M (Version 6.3.22 and earlier)<br /> airFiber AF60-XG (Version 1.2.2 and earlier)<br /> airFiber AF60 (Version 2.6.7 and earlier)<br /> <br /> <br /> <br /> Mitigation:<br /> <br /> Update your airMAX AC to Version 8.7.21 or later.<br /> Update your airMAX M to Version 6.3.24 or later.<br /> Update your airFiber AF60-XG to Version 1.2.3 or later.<br /> Update your airFiber AF60 to Version 2.6.8 or later.

Impact

Vector 3.x
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.40 MEDIUM
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x
5.40
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:ui:airmax_ac_firmware:*:*:*:*:*:*:*:* 8.7.21 (excluding)
cpe:2.3:h:ui:airmax_ac:-:*:*:*:*:*:*:*
cpe:2.3:o:ui:airmax_m_firmware:*:*:*:*:*:*:*:* 6.3.24 (excluding)
cpe:2.3:h:ui:airmax_m:-:*:*:*:*:*:*:*
cpe:2.3:o:ui:airfiber_af60-xg_firmware:*:*:*:*:*:*:*:* 1.2.3 (excluding)
cpe:2.3:h:ui:airfiber_af60-xg:-:*:*:*:*:*:*:*
cpe:2.3:o:ui:airfiber_af60_firmware:*:*:*:*:*:*:*:* 2.6.8 (excluding)
cpe:2.3:h:ui:airfiber_af60:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools