This indicates an attack attempt to exploit an Information Disclosure vulnerability in Microsoft Browsers.
The vulnerability is due to an error when the vulnerable software attempts to handle a maliciously crafted web page. An attacker can exploit this by tricking a user into visiting a malicious webpage and gain access to sensitive information within the context of the application.
Internet Explorer 11
Internet Explorer 11 on Windows 10
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems
Apply the most recent upgrade or patch from the vendor