Advisory: SB2021110931 - Remote code execution in Microsoft Excel
Vulnerable component: Microsoft Office
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 improper input validation when processing Excel files. A remote attacker can create a specially crafted Excel file, trick the victim into opening it and execute arbitrary code on the system.
Note, the vulnerability is being exploited in the wild.