Microsoft Defender SmartScreen Security Feature Bypass Vulnerability

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

Technical Severity

CVSS v3.1 Metrics

MEDIUM

5.4 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L/E:F/RL:O/RC:C

Exploitation Likelihood

EPSS Prediction

66.42 %

Predictive Probability

Percentile Rank

98.5 th

Documented as more likely to be exploited than 98.5% of known CVEs.

Detection Date

Dec 13, 2022

Remediation Due

Jan 03, 2023

CISA Catalog Active

Threat Analysis

Microsoft Defender SmartScreen contains a security feature bypass vulnerability that could allow an attacker to evade Mark of the Web (MOTW) defenses via a specially crafted malicious file.

Remediation Directive

Apply updates per vendor instructions.

Asset Context

Vendor Identity

Microsoft

Affected Product

Defender

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-755

External Intelligence

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-44698

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2022-44698