Zero-day vulnerability in Windows

Improper Privilege Management
CVE-2021-33739

The vulnerability was reported by DBAPPSecurity Lieying Lab.

Vulnerability details

Advisory: SB2021060823 - Remote code execution in Microsoft DWM Core Library

Vulnerable component: Windows

CVE-ID: CVE-2021-33739

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-269 - Improper Privilege Management

Description:

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper privilege management within the Microsoft DWM Core Library. A remote attacker can trick the victim to run a specially crafted executable or script and execute arbitrary code on the system.

External links:

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-33739


About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.