CVE Vulnerability Advisory Database
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Cisco Secure Firewall Management Center (FMC) Static Credentials Vulnerability (CVE-2026-20316)
[Affected Scope] Web interface of Cisco Secure Firewall Management Center (FMC) Software
[Impact] Unauthenticated remote attackers can log in using hardcoded low-privileged credentials to access sensitive data, which can be chained with other flaws to escalate privileges
[Mitigation] Apply the official Cisco security updates immediately and restrict public internet access to the FMC management interface
Zyxel Firewalls and AP Controllers Hardcoded Admin Credentials Vulnerability (CVE-2020-29583) Analysis & Mitigation Guide
[Affected Scope] Zyxel USG, ATP, VPN, and ZyWALL series firewalls and AP controllers running ZLD firmware version 4.60
[Impact] Remote attackers can gain full administrative access to the device's SSH server or web interface using an undocumented hardcoded account ('zyfwp')
[Mitigation] Immediately upgrade to ZLD v4.60 Patch 1 or later, and restrict WAN-side access to management interfaces (SSH/HTTPS).