Windows Server 2019 • Release: 7 Benchmark Date: 05 Jan 2026

CAT II V-205924 WN19-UC-000010

Windows Server 2019 must preserve zone information when saving attachments.

Documentable No
Rule ID SV-205924r991589_rule
CCI References
CCI-000366

Discussion

Attachments from outside sources may contain malicious code. Preserving zone of origin (Internet, intranet, local, restricted) information on file attachments allows Windows to determine risk.

Check Procedure

The default behavior is for Windows to mark file attachments with their zone information.

If the registry Value Name below does not exist, this is not a finding.

If it exists and is configured with a value of "2", this is not a finding.

If it exists and is configured with a value of "1", this is a finding.

Registry Hive: HKEY_CURRENT_USER
Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Attachments\

Value Name: SaveZoneInformation

Value Type: REG_DWORD
Value: 0x00000002 (2) (or if the Value Name does not exist)

Fix Action

The default behavior is for Windows to mark file attachments with their zone information.

If this needs to be corrected, configure the policy value for User Configuration >> Administrative Templates >> Windows Components >> Attachment Manager >> "Do not preserve zone information in file attachments" to "Not Configured" or "Disabled".