Internet Explorer 5.5 and 6.0 allows remote attackers to read and modify user cookies via Javascript in an about: URL, aka the "First Cookie Handling Vulnerability."
https://exchange.xforce.ibmcloud.com/vulnerabilities/7486
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-055
http://www.securityfocus.com/bid/3513