This indicates an attack attempt to exploit an Information Disclosure vulnerability in Microsoft Edge.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted HTML file. An attacker can exploit this by tricking an unsuspecting user into visiting a malicious web page and obtain sensitive information from vulnerable systems.
Microsoft Edge on Windows 10 Version 1809 for 32-bit Systems
Microsoft Edge on Windows 10 Version 1809 for x64-based Systems
Microsoft Edge on Windows 10 Version 1809 for ARM64-based Systems
Microsoft Edge on Windows Server 2019
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems.
Apply the most recent upgrade or patch from the vendor.