CVE-2025-8679
HIGH EPSS 23.7%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
7.6 CVSS 4.0
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/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 Attack Vector Adjacent
Attack Complexity High
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
23.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-307
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| extremenetworks | extremeguest_essentials | * | <25.5.0 |
References 1
- extreme-networks.my.site.com https://extreme-networks.my.site.com/ExtrArticleDetail?an=000130289
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.