CVE-2026-21639: CWE-120 Classic Buffer Overflow in Ubiquiti Inc airMAX AC
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.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-21639) affects Ubiquiti Inc's airMAX AC product and is classified as a classic buffer overflow (CWE-120). It allows a remote attacker in Wi-Fi range to execute arbitrary code remotely by exploiting the airMAX Wireless Protocol. The CVSS v3.1 base score is 8.8, reflecting low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. There is no vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation results in remote code execution on the affected airMAX AC device, compromising confidentiality, integrity, and availability. This could allow an attacker to fully control the device remotely over the wireless network.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, limit Wi-Fi access to trusted users and monitor for unusual activity. No official patch or workaround has been published by Ubiquiti Inc as of now.
CVE-2026-21639: CWE-120 Classic Buffer Overflow in Ubiquiti Inc airMAX AC
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.
CVSS v3.1
Score 8.8high
Affected software
Ubiquiti Inc
airMAX AC
Ubiquiti Inc
airMAX M
Ubiquiti Inc
airFiber AF60-XG
Ubiquiti Inc
airFiber AF60
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-21639) affects Ubiquiti Inc's airMAX AC product and is classified as a classic buffer overflow (CWE-120). It allows a remote attacker in Wi-Fi range to execute arbitrary code remotely by exploiting the airMAX Wireless Protocol. The CVSS v3.1 base score is 8.8, reflecting low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. There is no vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation results in remote code execution on the affected airMAX AC device, compromising confidentiality, integrity, and availability. This could allow an attacker to fully control the device remotely over the wireless network.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, limit Wi-Fi access to trusted users and monitor for unusual activity. No official patch or workaround has been published by Ubiquiti Inc as of now.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hackerone
- Date Reserved
- 2026-01-01T15:00:02.339Z
- State
- PUBLISHED
Threat ID: 695fd9d02717593a334c2be2
Added to database: 01/08/2026, 16:22:40 UTC
Last enriched: 07/30/2026, 21:44:13 UTC
Last updated: 09/10/2026, 22:27:55 UTC
Views: 1676
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