CVE-2021-40449 is a use-after-free vulnerability in Win32k's NtGdiResetDC function. As with many other Win32k vulnerabilities, the root cause of this vulnerability lies in the ability to set user-mode callbacks and execute unexpected API functions during execution of those callbacks. The CVE-2021-40449 is triggered when the function ResetDC is executed a second time for the same handle during execution of its own callback.
This is a critical vulnerability in the MSHTML rendering engine. Microsoft Office applications use the MSHTML engine to process and display web content. An adversary who successfully exploits could achieve full control over a target system by using malicious ActiveX controls to execute arbitrary code.



This Update contains the following improvements:



-Default Connection method was changed to HTTPS

-Early Release Warning was removed

-Several "Application Name" in "Supported systems" property were added

-Added html obfuscation when possible to avoid AV detection

-All file names are randomized

-Now users can choose between using cab file method or not
This is a critical vulnerability in the MSHTML rendering engine. Microsoft Office applications use the MSHTML engine to process and display web content. An adversary who successfully exploits could achieve full control over a target system by using malicious ActiveX controls to execute arbitrary code.
The Lexmark Universal Print Driver version 2.15.1.0 and below, G2 driver 2.7.1.0 and below, G3 driver 3.2.0.0 and below, and G4 driver 4.2.1.0 and below are affected by a privilege escalation vulnerability. A standard low priviliged user can use the driver to execute a DLL of their choosing during the add printer process, resulting in escalation of privileges to SYSTEM.