Advisory: SB2021011213 - Remote code execution in Microsoft Defender
Vulnerable component: Windows Defender
CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
CWE-ID: CWE-20 - Improper input validation
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the system.
Note, the vulnerability is being actively exploited in the wild.