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. The flaw exists in the social_login.cgi CGI program and could allow an attacker connected to the WLAN to bypass captive portal authentication. The vulnerability has a CVSS 3.1 base 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. The vulnerability impacts confidentiality but does not affect integrity or availability.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-8508) involves improper authentication (CWE-287) in the social_login.cgi CGI program of Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0. It allows an attacker on the wireless LAN to bypass the captive portal authentication mechanism, potentially gaining unauthorized network access. The CVSS 3.1 vector indicates the attack requires adjacent network access (AV:A), has low attack complexity (AC:L), requires no privileges (PR:N), no user interaction (UI:N), and impacts confidentiality (C:H) without affecting integrity or availability. No vendor advisory or patch information is currently available.
Potential Impact
An attacker on the WLAN can bypass captive portal authentication, potentially gaining unauthorized access to network resources or services that are normally restricted. The confidentiality of the network is impacted, but there is no indication of integrity or availability impact. This could lead to unauthorized network usage or data exposure within the WLAN environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or workaround has been published by Zyxel, users should monitor Zyxel's advisories for updates. In the meantime, restricting WLAN access to trusted users and monitoring network activity may help reduce risk.
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. The flaw exists in the social_login.cgi CGI program and could allow an attacker connected to the WLAN to bypass captive portal authentication. The vulnerability has a CVSS 3.1 base 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. The vulnerability impacts confidentiality but does not affect integrity or availability.
CVSS v3.1
Score 6.5medium
Affected software
Zyxel
WAX650S firmware
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-8508) involves improper authentication (CWE-287) in the social_login.cgi CGI program of Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0. It allows an attacker on the wireless LAN to bypass the captive portal authentication mechanism, potentially gaining unauthorized network access. The CVSS 3.1 vector indicates the attack requires adjacent network access (AV:A), has low attack complexity (AC:L), requires no privileges (PR:N), no user interaction (UI:N), and impacts confidentiality (C:H) without affecting integrity or availability. No vendor advisory or patch information is currently available.
Potential Impact
An attacker on the WLAN can bypass captive portal authentication, potentially gaining unauthorized access to network resources or services that are normally restricted. The confidentiality of the network is impacted, but there is no indication of integrity or availability impact. This could lead to unauthorized network usage or data exposure within the WLAN environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or workaround has been published by Zyxel, users should monitor Zyxel's advisories for updates. In the meantime, restricting WLAN access to trusted users and monitoring network activity may help reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Zyxel
- Date Reserved
- 2026-05-14T03:49:26.094Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a71e167bf8831d539d34e3e
Added to database: 08/04/2026, 12:56:07 UTC
Last enriched: 08/11/2026, 18:09:52 UTC
Last updated: 09/18/2026, 22:01:39 UTC
Views: 72
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