CVE-2025-8679— ExtremeGuest Essentials Captive Portal Unauthenticated Brute Force
Quick assessment
Affected
Extreme Networks ExtremeGuest Essentials
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
ExtremeGuest Essentials是Extreme公司的一个WiFi用户接入与分析平台。 ExtremeGuest Essentials 25.5.0之前版本存在安全漏洞，该漏洞源于强制门户配置不当，可能导致未经授权的网络访问。
Possible ATT&CK Techniques 1 AI
T1110 · Brute Force
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I. Basic Information for CVE-2025-8679
Vulnerability Information
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Vulnerability Title
ExtremeGuest Essentials Captive Portal Unauthenticated Brute Force
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
ExtremeGuest Essentials 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ExtremeGuest Essentials是Extreme公司的一个WiFi用户接入与分析平台。 ExtremeGuest Essentials 25.5.0之前版本存在安全漏洞，该漏洞源于强制门户配置不当，可能导致未经授权的网络访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Extreme Networks | ExtremeGuest Essentials | 25.4.0 | - |
|
II. Public POCs for CVE-2025-8679
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2025-8679 (1)
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V. Comments for CVE-2025-8679
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