STIGQter STIGQter: STIG Summary: Microsoft IIS 10.0 Site Security Technical Implementation Guide Version: 2 Release: 16 Benchmark Date: 01 Jul 2026:

Non-ASCII characters in URLs must be prohibited by any IIS 10.0 website.

DISA Rule

SV-218756r1210388_rule

Vulnerability Number

V-218756

Group Title

SRG-APP-000246-WSR-000149

Rule Version

IIST-SI-000228

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Click the site name under review.

Double-click the "Request Filtering" icon.

Click "Edit Feature Settings" in the "Actions" pane.

Uncheck the "Allow high-bit characters" check box.

Check Contents

Note: If either of the following is true, this requirement is Not Applicable:
- The server being reviewed is hosting SharePoint.
- This IIS 10.0 installation is supporting Microsoft Exchange and not otherwise hosting any content.

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Click the site name.

Double-click the "Request Filtering" icon.

Click "Edit Feature Settings" in the "Actions" pane.

If the "Allow high-bit characters" check box is checked, this is a finding.

Vulnerability Number

V-218756

Documentable

False

Rule Version

IIST-SI-000228

Severity Override Guidance

Note: If either of the following is true, this requirement is Not Applicable:
- The server being reviewed is hosting SharePoint.
- This IIS 10.0 installation is supporting Microsoft Exchange and not otherwise hosting any content.

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Click the site name.

Double-click the "Request Filtering" icon.

Click "Edit Feature Settings" in the "Actions" pane.

If the "Allow high-bit characters" check box is checked, this is a finding.

Check Content Reference

M

Target Key

4051