SC-18(4)—Prevent Automatic Execution
>Control Description
Prevent the automatic execution of mobile code in [Assignment: organization-defined software applications] and enforce [Assignment: organization-defined actions] prior to executing the code.
>Supplemental Guidance
Actions enforced before executing mobile code include prompting users prior to opening email attachments or clicking on web links. Preventing the automatic execution of mobile code includes disabling auto-execute features on system components that employ portable storage devices, such as compact discs, digital versatile discs, and universal serial bus devices.