Microsoft Index Server 2.0 in Windows NT 4.0, and Indexing Service in Windows 2000, allows remote attackers to read server-side include files via a malformed search request, aka a new variant of the "Malformed Hit-Highlighting" vulnerability.
https://exchange.xforce.ibmcloud.com/vulnerabilities/6518
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-025