IIS 5.0 uses relative paths to find system files that will run in-process, which allows local users to gain privileges via a Trojan horse file, aka the "System file listing privilege elevation" vulnerability.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A912
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A909
https://exchange.xforce.ibmcloud.com/vulnerabilities/6985
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-044