CVE-2020-1054highunder attackCWE-787

CVE-2020-1054: high-severity vulnerability in Microsoft Windows 10 Version 1507

Win32k Elevation of Privilege Vulnerability

Published · Updated

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100Vexday Risk Score

Patch now. It under exploitation confirmed by CISA and has a working public exploit.

ssvc Actcvss 7epss 54%
from disclosure to weapon26 days
Published on NVDMay 21
1st PoC+26d
metasploitFeb 20
CISA KEV+531d
Action required by CISAfederal deadline: 2022-05-03

Apply updates per vendor instructions.

In short

A flaw in Windows kernel-mode driver allows an attacker with local access to gain elevated privileges by exploiting improper memory object handling. This lets unprivileged users take control of the system.

Technical detail

Win32k elevation of privilege vulnerability caused by improper memory object handling in kernel-mode drivers. Requires local system access; successful exploitation grants SYSTEM-level privileges, enabling complete system compromise.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The update addresses this vulnerability by correcting how the Windows kernel-mode driver handles objects in memory.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
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