Zero-day vulnerability in Microsoft Office

Input validation error
CVE-2021-42292

Vulnerability details

Advisory: SB2021110931 - Remote code execution in Microsoft Excel

Vulnerable component: Microsoft Office

CVE-ID: CVE-2021-42292

CVSSv3 score: CVSS:3.0/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

Description:

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.

External links:

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-42292