This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft Edge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of custom properties in CSS. By manipulating a documentâs elements, an attacker can trigger a type confusion condition. An attacker may be able to leverage this in conjunction with other vulnerabilities to execute code in the context of the current process.