An information disclosure vulnerability exists in the Windows Event Viewer (eventvwr.msc) when it improperly parses XML input containing a reference to an external entity, aka 'Windows Event Viewer Information Disclosure Vulnerability'.
https://www.tenable.com/blog/tenable-roundup-for-microsofts-june-2019-patch-tuesday
https://www.zerodayinitiative.com/advisories/ZDI-19-641/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0948