1.25 O365-CO-000023

Information

ActiveX installation restriction must be enabled in all Office programs.

GROUP ID: V-223305
RULE ID: SV-223305r961779

Microsoft ActiveX controls allow unmanaged, unprotected code to run on the user computers. ActiveX controls do not run within a protected container in the browser like the other types of HTML or Microsoft Silverlight-based controls. Disabling or not configuring this setting does not block prompts for ActiveX control installations, and these prompts display to users. This could allow malicious code to become active on user computers or the network.

Solution

Set the policy value for

Computer Configuration >> Administrative Templates >> Microsoft Office 2016 (Machine) >> Security Settings >> IE Security >> Restrict ActiveX Install to 'Enabled'

and select the check boxes for all installed Office programs.

See Also

https://workbench.cisecurity.org/benchmarks/26066