CVE-2021-38646highunder attackransomware

CVE-2021-38646: high-severity vulnerability in Microsoft 365 Apps for Enterprise

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

Published · Updated

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

51Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA.

ssvc Actcvss 7.8epss 8.0%
from disclosure to weapon
Published on NVDSep 15
CISA KEV+194d
Action required by CISAfederal deadline: 2022-04-18

Apply updates per vendor instructions.

In short

A vulnerability in Microsoft Office's Access Connectivity Engine allows an attacker to execute malicious code on a computer by tricking a user into opening a specially crafted file. This can lead to complete system compromise.

Technical detail

The vulnerability exists in the Access Connectivity Engine component when processing malformed database files or queries. An attacker can craft a malicious Office document that triggers unsafe code execution during file parsing, bypassing security boundaries and achieving arbitrary code execution in the user's security context.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C