DTOO322 - Fatally corrupt files must be blocked from opening.
Enabling this setting allows a user to open fatally corrupt Publisher 2013 files. As a result, malicious code or users could become active on the user's computer or the network. For example, a malicious user may purposely corrupt a Publisher file. The corrupted file could force the application to fail or execute malicious code, giving the malicious user control of Publisher 2013.
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Publisher 2013 -> Security 'Prompt to allow fatally corrupt files to open instead of blocking them' to 'Disabled'.