CVE-2009-0545: cgi-bin/kerbynet in ZeroShell 1.0beta11 and earlier allows remote attackers to execute arbitrary commands v...

Security readout for executives and security teams

This CVE describes remote command execution in ZeroShell 1.0beta11 and earlier. An attacker could abuse an unauthenticated certificate-listing action to make the appliance run system commands. For an exposed network security system, that can mean full compromise of the device and a pivot point into the environment. Exposure is limited to organizations still running ZeroShell 1.0beta11 or earlier, especially if the Kerbynet CGI interface is reachable from untrusted networks. The supplied affected-product metadata is incomplete, so version and deployment confirmation are essential. Prioritize quickly if ZeroShell is present. This is old technology, but legacy internet-facing appliances often remain unmanaged. Confirm exposure, patch or isolate affected systems, and investigate suspicious access if the management interface was reachable. Mitigation focus: Identify and prioritize any ZeroShell 1.0beta11 or earlier systems.; Review ZeroShell patch C100 and vendor announcements for the corrective action.; Apply the vendor-supported patch or upgrade path where available..

Prepared

Jun 28, 2026, 11:23 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.