Improper Authentication Vulnerability in Zyxel WAX650S Firmware
CVE-2026-8508

6.5MEDIUM

Key Information:

Vendor

Zyxel
Status
Wax650s Firmware
Vendor
CVE Published:
4 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8508?

An improper authentication flaw exists in the 'social_login.cgi' CGI program within Zyxel WAX650S firmware, allowing attackers connected to the WLAN to bypass captive portal authentication protocols. This vulnerability could enable unauthorized access to network resources, posing a significant risk to network security.

Affected Version(s)

WAX650S firmware <= 7.10(ABRM.4)C0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

zyxel-social-login-bypass-cve-2026-8508
Created by minanagehsalalma

References

https://www.zyxel.com/global/en/support/security-advisori...
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.