Microsoft IIS 10.0 Server STIG Version Comparison

There are 3 differences between versions v3 r4 (July 2, 2025) (the "left" version) and v3 r6 (Jan. 5, 2026) (the "right" version).

Check IIST-SV-000210 was removed from the benchmark in the "right" version. The text below reflects the old wording.

This check's original form is available here.

Title

HTTPAPI Server version must be removed from the HTTP Response Header information.

Check Content

Note: If the server is hosting WSUS, this is Not Applicable. Open Registry Editor. Navigate to "HKLM\System\CurrentControlSet\Services\HTTP\Parameters" Verify "DisableServerHeader” is set to "2". If REG_DWORD DisableServerHeader is not set to 2, this is a finding. If the System Administrator can show that Server Version information has been removed via other means, such as using a rewrite outbound rule, this is not a finding.

Discussion

HTTP Response Headers contain information that could enable an attacker to gain access to an information system. Failure to prevent the sending of certain HTTP Response Header information to remote requesters exposes internal configuration information to potential attackers.

Fix

Navigate to "HKLM\System\CurrentControlSet\Services\HTTP\Parameters". Create REG_DWORD "DisableServerHeader” and set it to "2". Note: This can be performed multiple ways; this is an example.