Most Exploitable CVEs of 1997

CVE-1999-0253

IIS 3.0 with the iis-fix hotfix installed allows remote intruders to read source code for ASP programs by using a %2e instead of a . (dot) in the URL.
about 24 years ago

CVE-1999-0281

Denial of service in IIS using long URLs.
almost 24 years ago