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ZDI-26-533: Cisco Secure Firewall Management Center login.cgi Authentication Bypass Vulnerability

ZDI discloses CVE-2026-20316, a 9.8-rated unauthenticated authentication bypass in Cisco Secure Firewall Management Center login.cgi.

ZDI-26-533 describes an authentication bypass vulnerability in Cisco Secure Firewall Management Center's login.cgi that allows remote attackers to bypass authentication without any credentials. ZDI assigned a CVSS score of 9.8, and the flaw is tracked as CVE-2026-20316. As a central management plane for firewall infrastructure, compromise could enable broad policy changes.

ZDI Published Advisories · Aug 11, 2026VulnerabilityCVE-2026-20316

ZDI-26-709: Cisco Secure Firewall Management Center CommandSinkRmi Deserialization of Untrusted Data Remote Code Execution Vulnerability

ZDI disclosed CVE-2026-20242, an unauthenticated deserialization flaw in Cisco Secure Firewall Management Center enabling remote code execution (CVSS 8.1).

ZDI published advisory ZDI-26-709 describing deserialization of untrusted data in Cisco Secure Firewall Management Center's CommandSinkRmi component, tracked as CVE-2026-20242 with CVSS 8.1. Remote attackers can execute arbitrary code on affected installations without authentication. The advisory does not indicate whether exploitation has been observed in the wild.