The DSN local system must use approved software updates and patches for all components.

All patches and new system software must be tested on non-production systems and hardware prior to use to determine the effects the new software will have on systems operations and security. Approved products are listed on the DoD Approved Products list (APL) to include the specific versions and releases. Additionally, the Information Assurance Vulnerability Management (IAVM) system provides information on versions and releases that may have security issues, to include zero-day vulnerabilities. The Authorizing Official (AO) can accept the risk of using software updates or patches on the system when mission essential.