CVE-2025-8679ExtremeGuest Essentials Captive Portal Unauthenticated Brute Force
Updated under an hour ago ()
Does this affect you?
It affects Extreme Networks ExtremeGuest Essentials and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- 7.6 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-307
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- ExtremeNetworks
- NVD analysis
- Analyzed
- Record last updated
- Oct 1, 2025
- First seen by InfoSec Signals
- Oct 12, 2026
Affected products
Extreme Networks ExtremeGuest Essentials extreme_networks:extremeguest_essentials (from the name) | 25.4.0 | CNA record |
extremenetworks extremeguest_essentials extremenetworks:extremeguest_essentials | before 25.5.0 | NVD |
References
- https://extreme-networks.my.site.com/ExtrArticleDetail?an=000130289vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.