CVE-2025-8679
ExtremeGuest Essentials Captive Portal Unauthenticated Brute Force
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.
INFO
Published Date :
Oct. 1, 2025, 6:15 p.m.
Last Modified :
Oct. 1, 2025, 6:15 p.m.
Remotely Exploit :
No
Source :
1c053176-eef3-4d6a-ae0b-24728c86587b
Affected Products
The following products are affected by CVE-2025-8679
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | 1c053176-eef3-4d6a-ae0b-24728c86587b | ||||
| CVSS 4.0 | HIGH | 1c053176-eef3-4d6a-ae0b-24728c86587b |
Solution
- Update ExtremeGuest Essentials to version 25.5.0 or later.
- Review and secure captive-portal SSID configurations.
- Monitor Client360 logs for unusual authentication activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-8679.
| URL | Resource |
|---|---|
| https://extreme-networks.my.site.com/ExtrArticleDetail?an=000130289 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-8679 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-8679
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-8679 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-8679 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 1c053176-eef3-4d6a-ae0b-24728c86587b
Oct. 01, 2025
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-307 Added Reference https://extreme-networks.my.site.com/ExtrArticleDetail?an=000130289