CVE-2026-8508: CWE-287: Improper Authentication in Zyxel WAX650S firmware
CVE-2026-8508 is an improper authentication vulnerability in the Zyxel WAX650S firmware affecting versions up to 7.10(ABRM.4)C0. It involves the "social_login.cgi" CGI program, which could allow an attacker on the WLAN to bypass captive portal authentication. The vulnerability has a CVSS score of 6.5, indicating a medium severity level. No official patch or remediation guidance has been provided by Zyxel as of the publication date. There are no known exploits in the wild currently.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-8508) in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 is classified as CWE-287 (Improper Authentication). It affects the "social_login.cgi" CGI program, enabling an attacker with access to the WLAN to bypass captive portal authentication mechanisms. The CVSS v3.1 base score is 6.5 with attack vector as adjacent network, low attack complexity, no privileges required, no user interaction, unchanged scope, and high confidentiality impact but no integrity or availability impact. No vendor advisory or patch information is currently available.
Potential Impact
An attacker on the WLAN could bypass captive portal authentication, potentially gaining unauthorized network access. The confidentiality of network resources may be compromised, but integrity and availability are not impacted according to the CVSS vector. This could lead to unauthorized access to network services or data accessible behind the captive portal.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, network administrators should consider restricting WLAN access or implementing additional network-level controls to mitigate unauthorized access risks.
CVE-2026-8508: CWE-287: Improper Authentication in Zyxel WAX650S firmware
Description
CVE-2026-8508 is an improper authentication vulnerability in the Zyxel WAX650S firmware affecting versions up to 7.10(ABRM.4)C0. It involves the "social_login.cgi" CGI program, which could allow an attacker on the WLAN to bypass captive portal authentication. The vulnerability has a CVSS score of 6.5, indicating a medium severity level. No official patch or remediation guidance has been provided by Zyxel as of the publication date. There are no known exploits in the wild currently.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-8508) in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 is classified as CWE-287 (Improper Authentication). It affects the "social_login.cgi" CGI program, enabling an attacker with access to the WLAN to bypass captive portal authentication mechanisms. The CVSS v3.1 base score is 6.5 with attack vector as adjacent network, low attack complexity, no privileges required, no user interaction, unchanged scope, and high confidentiality impact but no integrity or availability impact. No vendor advisory or patch information is currently available.
Potential Impact
An attacker on the WLAN could bypass captive portal authentication, potentially gaining unauthorized network access. The confidentiality of network resources may be compromised, but integrity and availability are not impacted according to the CVSS vector. This could lead to unauthorized access to network services or data accessible behind the captive portal.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, network administrators should consider restricting WLAN access or implementing additional network-level controls to mitigate unauthorized access risks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Zyxel
- Date Reserved
- 2026-05-14T03:49:26.094Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a71e167bf8831d539d34e3e
Added to database: 08/04/2026, 12:56:07 UTC
Last enriched: 08/04/2026, 12:57:56 UTC
Last updated: 08/04/2026, 13:01:04 UTC
Views: 4
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