Is CVE-2025-8679 actively exploited?

No active exploitation of CVE-2025-8679 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-8679 be exploited remotely?

Yes. CVE-2025-8679 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-8679?

CVE-2025-8679 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2025-8679

CWE-307Published: October 1, 2025· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In ExtremeGuest Essentials before 25.5.0, captive-portal may permit unauthorized access via manual brute-force procedure. Under certain ExtremeGuest Essentials captive-portal SSID configurations, repeated manual login attempts may allow an unauthenticated device to be marked as authenticated and obtain network access. Client360 logs may display the client MAC as the username despite no MAC-authentication being enabled.

NVD Source

Technical Analysis

CVE-2025-8679 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.