Microsoft Win32k Privilege Escalation Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

HIGH

7.8 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation Likelihood

78.16 %

Predictive Probability

Percentile Rank

99.0 th

Documented as more likely to be exploited than 99.0% of known CVEs.

Detection Date

Jan 21, 2022

Remediation Due

Jul 21, 2022

CISA Catalog Active

Threat Analysis

Microsoft Windows Win32k contains a vulnerability that allows an attacker to escalate privileges.

Apply updates per vendor instructions.

Vendor Identity

Microsoft

Affected Product

Win32k

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-404

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2018-8453