STIGQter STIGQter: STIG Summary: Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 02 Jul 2025:

Exchange software must be monitored for unauthorized changes.

DISA Rule

SV-259701r1015279_rule

Vulnerability Number

V-259701

Group Title

SRG-APP-000381

Rule Version

EX19-MB-000197

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Update the EDSP to specify that the organization monitors system files on servers for unauthorized changes against a baseline on a weekly basis or verify that this information is documented by the organization.

Monitor the software files (e.g., *.exe, *.bat, *.com, *.cmd, and *.dll) on Exchange servers for unauthorized changes against a baseline on a weekly basis.

Note: This can be done with the use of various monitoring tools.

Check Contents

Review the Email Domain Security Plan (EDSP).

Determine whether the site monitors system files (e.g., *.exe, *.bat, *.com, *.cmd, and *.dll) on servers for unauthorized changes against a baseline on a weekly basis.

If software files are not monitored for unauthorized changes, this is a finding.

Note: An approved and properly configured solution will contain both a list of baselines that includes all system file locations and a file comparison task that is scheduled to run at least weekly.

Vulnerability Number

V-259701

Documentable

False

Rule Version

EX19-MB-000197

Severity Override Guidance

Review the Email Domain Security Plan (EDSP).

Determine whether the site monitors system files (e.g., *.exe, *.bat, *.com, *.cmd, and *.dll) on servers for unauthorized changes against a baseline on a weekly basis.

If software files are not monitored for unauthorized changes, this is a finding.

Note: An approved and properly configured solution will contain both a list of baselines that includes all system file locations and a file comparison task that is scheduled to run at least weekly.

Check Content Reference

M

Target Key

5580