Adobe Acrobat Pro DC Continuous Protected Mode must be enabled.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-213127	SRG-APP-000431	AADC-CN-001010	SV-213127r766538_rule	2021-06-22	2

Description
Protected Mode is a “sandbox” that is essentially a read-only mode. When enabled, Acrobat allows the execution environment of untrusted PDF's and the processes the PDF may invoke but also presumes all PDFs are potentially malicious and confines processing to a restricted sandbox.

ℹ️ Check
Verify the following registry configuration: Using the Registry Editor, navigate to the following: HKEY_LOCAL_MACHINE\Software\Policies\Adobe\Adobe Acrobat\DC\FeatureLockDown Value Name: bProtectedMode Type: REG_DWORD Value: 1 If the value for bProtectedMode is not set to “1” and Type is not configured to REG_DWORD or does not exist, this is a finding. Admin Template path: Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Continuous > Preferences > 'Protected Mode' must be set to 'Enabled'.

ℹ️ Check

Verify the following registry configuration: Using the Registry Editor, navigate to the following: HKEY_LOCAL_MACHINE\Software\Policies\Adobe\Adobe Acrobat\DC\FeatureLockDown Value Name: bProtectedMode Type: REG_DWORD Value: 1 If the value for bProtectedMode is not set to “1” and Type is not configured to REG_DWORD or does not exist, this is a finding. Admin Template path: Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Continuous > Preferences > 'Protected Mode' must be set to 'Enabled'.

✔️ Fix
Configure the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Policies\Adobe\Adobe Acrobat\DC\FeatureLockDown Value Name: bProtectedMode Type: REG_DWORD Value: 1 Configure the policy value for Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Continuous > Preferences > 'Protected Mode' to 'Enabled'.