Local security-control removal via uninstaller hook bypass

Improper hook-argument validation in Skyhigh Client Proxy 4.8.1 and earlier allows local users to uninstall the client without its password. The vendor identifies API hooking in the Windows uninstaller challenge-response path as the bypass locus but does not publish the flawed hook or validation logic. Low-privilege local access is required; successful exploitation removes the traffic-enforcement client and impairs its security controls without directly exposing stored data.