CVE•Published 2025-10-01•Modified 2026-10-12•1 article on news•6 live references•NVD data
CVE-2025-8679Extremenetworks · Extremeguest_essentials
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
25
Exploit Prediction Scoring System · top 75% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2025-10-01
Modified 2026-10-12
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-8679Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Extremenetworks Extremeguest Essentials"All exposed Extremenetworks Extremeguest Essentials instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Extremeguest Essentials"HTTP body or banner mentions "Extremeguest Essentials" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-8679Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-8679Censys host search filtered to this CVE id.
grep.app
CVE-2025-8679Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-8679GitHub code search for direct mentions.
Google dork
"CVE-2025-8679" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.