Disclosure Date: April 14, 2015 (last updated July 30, 2020)
HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted HTTP requests, aka "HTTP.sys Remote Code Execution Vulnerability."
Disclosure Date: May 29, 2019 (last updated July 23, 2020)
Disclosure Date: August 09, 2019 (last updated February 13, 2020)
This vulnerability can be triggered by a specially crafted IP packet sent to the target device, even as a broadcast or multicast packet. It does not require any specific application or configuration to be running on the device, and it affects any device running VxWorks v6.9.4 or above with a network connection. The vulnerability causes a stack overflow in the handling of IP options in the IPv4 header, making it easy to reach RCE by it.
Disclosure Date: March 12, 2020 (last updated July 24, 2020)
An elevation of privilege vulnerability exists when the Windows Graphics Component improperly handles objects in memory, aka 'Windows Graphics Component Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0898.
An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
To quote the Reuters report: "To execute the hack, Avraham said victims would be sent an apparently blank email message through the Mail app forcing a crash and reset. The crash opened the door for hackers to steal other data on the device, such as photos and contact details."
So, it sounds like a font or other kind of render thing in Mail.App. No clicks required other than opening the email.