CVE-2026-21639_CVE-2026-21639

5.4 / 10

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

Basic Information

ID CVE-2026-21639

Source hackerone

Published Jan 8, 2026 at 16:14

Modified Jan 8, 2026 at 17:21

Affected Product

Vendor Ubiquiti Inc

Product airMAX AC

Affected Versions Ubiquiti Inc airMAX AC 0
Ubiquiti Inc airMAX M 0
Ubiquiti Inc airFiber AF60-XG 0
Ubiquiti Inc airFiber AF60 0

CWE Classification

CWE-77

References

community.ui.com /releases/Security-Advisory-Bulletin-061-061/1e4fe5f8-29c7-4a7d-a518-01b1537983ba

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    "lastseen": "",
    "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.\r\n\r\n \r\n\r\nAffected Products:\r\n\r\nairMAX AC (Version 8.7.20 and earlier)\r\nairMAX M (Version 6.3.22 and earlier)\r\nairFiber AF60-XG (Version 1.2.2 and earlier)\r\nairFiber AF60 (Version 2.6.7 and earlier)\r\n\r\n \r\n\r\nMitigation:\r\n\r\nUpdate your airMAX AC to Version 8.7.21 or later.\r\nUpdate your airMAX M to Version 6.3.24 or later.\r\nUpdate your airFiber AF60-XG to Version 1.2.3 or later.\r\nUpdate your airFiber AF60 to Version 2.6.8 or later.",
    "published": "2026-01-08T16:14:22.626Z",
    "modified": "2026-01-08T17:21:53.724Z",
    "type": "cve",
    "title": "CVE-2026-21639",
    "source": "hackerone",
    "references": "https://community.ui.com/releases/Security-Advisory-Bulletin-061-061/1e4fe5f8-29c7-4a7d-a518-01b1537983ba",
    "id": "CVE-2026-21639",
    "bulletinFamily": "",
    "cwe": [
        "CWE-77"
    ],
    "cvelist": null,
    "sourceData": "Ubiquiti Inc airMAX AC 0\nUbiquiti Inc airMAX M 0\nUbiquiti Inc airFiber AF60-XG 0\nUbiquiti Inc airFiber AF60 0",
    "sourceHref": "",
    "cvss": {
        "score": 5.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "airMAX AC",
    "version": "0",
    "vendor": "Ubiquiti Inc",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}