In PHP, when using Apache and PHP-CGI on Windows and if the system is set up to use certain code pages, Windows may use "Best-Fit" behavior to replace characters in command line given to Win32 API functions. PHP CGI module may misinterpret those characters as PHP options, which may allow remote attackers to pass options to PHP binary being run, leading to execute system commands in the context of the affected application.
An identified vulnerability in ScreenConnect allows attackers to bypass string comparison in the request path and access the setup wizard ("/SetupWizard.aspx") on configured instances. Exploiting this vulnerability enables an attacker to create an administrative user and upload a malicious ScreenConnect extension, potentially leading to remote code execution (RCE) on the server.