O365-CO-000023 - ActiveX installation restriction must be enabled in all Office programs.

Information

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://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Office_365_ProPlus_V3R1_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-18(4), CAT|II, CCI|CCI-002460, Rule-ID|SV-223305r961779_rule, STIG-ID|O365-CO-000023, STIG-Legacy|SV-108789, STIG-Legacy|V-99685, Vuln-ID|V-223305

Plugin: Windows

Control ID: 789da63f7971a6118b0556bc2265f9d7f708e2a1f84e6e98f28827362c9a3e2c