CVE-2026-21639
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-08

Last updated on: 2026-01-14

Assigner: HackerOne

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.
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Meta Information
Published
2026-01-08
Last Modified
2026-01-14
Generated
2026-06-16
AI Q&A
2026-01-08
EPSS Evaluated
2026-06-15
NVD
CVE-2026-21639
EUVD
EUVD-2026-1493
Affected Vendors & Products
Showing 8 associated CPEs
Vendor Product Version / Range
ui airmax_ac_firmware to 8.7.21 (exc)
ui airmax_ac *
ui airmax_m_firmware to 6.3.24 (exc)
ui airmax_m *
ui airfiber_af60-xg_firmware to 1.2.3 (exc)
ui airfiber_af60-xg *
ui airfiber_af60_firmware to 2.6.8 (exc)
ui airfiber_af60 *
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Executive Summary

This vulnerability allows a malicious actor within Wi-Fi range to exploit a flaw in the airMAX Wireless Protocol, enabling them to execute remote code on the affected product. This means the attacker can run arbitrary code remotely on devices running vulnerable versions of airMAX AC, airMAX M, airFiber AF60-XG, or airFiber AF60.

Impact Analysis

The vulnerability can lead to remote code execution on affected devices, potentially allowing attackers to take control of the device, disrupt network operations, steal data, or use the device as a foothold for further attacks within the network.

Mitigation Strategies

Update your affected devices to the fixed versions: airMAX AC to Version 8.7.21 or later, airMAX M to Version 6.3.24 or later, airFiber AF60-XG to Version 1.2.3 or later, and airFiber AF60 to Version 2.6.8 or later.

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