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

CVE-2025-8679 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Extremeguest Essentials are affected by CVE-2025-8679?

Organizations using ExtremeGuest Essentials face critical risk from CVE-2025-8679, a brute-force weakness vulnerability rated CVSS 9.8.

How to fix or mitigate CVE-2025-8679?

Within 24 hours: Identify all affected systems running ExtremeGuest Essentials and apply vendor patches immediately. Monitor vendor channels for patch availability.

Extremeguest Essentials CVE-2025-8679

EUVD-2025-32714 CRITICAL

Improper Restriction of Excessive Authentication Attempts (CWE-307)

2025-10-01 1c053176-eef3-4d6a-ae0b-24728c86587b

Authentication Bypass Extremeguest Essentials

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 13, 2026 - 18:18 euvd

EUVD-2025-32714

Analysis Generated

Mar 13, 2026 - 18:18 vuln.today

CVE Published

Oct 01, 2025 - 18:15 nvd

CRITICAL 9.8

DescriptionCVE.org

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.