CVE-2026-21639

Published Jan 8, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Remote Code Execution via airMAX Wireless Protocol in Ubiquiti AirMAX and AirFiber Devices
Type Values Removed Values Added
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: airMAX AC (Version 8.7.20 and earlier) airMAX M (Version 6.3.22 and earlier) airFiber AF60-XG (Version 1.2.2 and earlier) airFiber AF60 (Version 2.6.7 and earlier) Mitigation: Update your airMAX AC to Version 8.7.21 or later. Update your airMAX M to Version 6.3.24 or later. Update your airFiber AF60-XG to Version 1.2.3 or later. Update your airFiber AF60 to Version 2.6.8 or later. 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.
Weaknesses CWE-120
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Title Remote Code Execution via airMAX Wireless Protocol in Ubiquiti AirMAX and AirFiber Devices
Type Values Removed Values Added
First Time appeared Ui
Ui airfiber Af60
Ui airfiber Af60-xg
Ui airfiber Af60-xg Firmware
Ui airfiber Af60 Firmware
Ui airmax Ac
Ui airmax Ac Firmware
Ui airmax M
Ui airmax M Firmware
CPEs cpe:2.3:h:ui:airfiber_af60-xg:-:*:*:*:*:*:*:*
cpe:2.3:h:ui:airfiber_af60:-:*:*:*:*:*:*:*
cpe:2.3:h:ui:airmax_ac:-:*:*:*:*:*:*:*
cpe:2.3:h:ui:airmax_m:-:*:*:*:*:*:*:*
cpe:2.3:o:ui:airfiber_af60-xg_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:airfiber_af60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:airmax_ac_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ui:airmax_m_firmware:*:*:*:*:*:*:*:*
Vendors & Products Ui
Ui airfiber Af60
Ui airfiber Af60-xg
Ui airfiber Af60-xg Firmware
Ui airfiber Af60 Firmware
Ui airmax Ac
Ui airmax Ac Firmware
Ui airmax M
Ui airmax M Firmware
Type Values Removed Values Added
First Time appeared Ubiquiti
Ubiquiti airfiber Af60
Ubiquiti airfiber Af60 Xg
Ubiquiti airmax Ac
Ubiquiti airmax M
Vendors & Products Ubiquiti
Ubiquiti airfiber Af60
Ubiquiti airfiber Af60 Xg
Ubiquiti airmax Ac
Ubiquiti airmax M
Type Values Removed Values Added
Weaknesses CWE-77
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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: airMAX AC (Version 8.7.20 and earlier) airMAX M (Version 6.3.22 and earlier) airFiber AF60-XG (Version 1.2.2 and earlier) airFiber AF60 (Version 2.6.7 and earlier) Mitigation: Update your airMAX AC to Version 8.7.21 or later. Update your airMAX M to Version 6.3.24 or later. Update your airFiber AF60-XG to Version 1.2.3 or later. Update your airFiber AF60 to Version 2.6.8 or later.
References