CVE-2022-44698Actively exploitedAdded to KEV 2022-12-13Medium severity, CVSS 5.4Known ransomware campaign use

Microsoft Defender SmartScreen Security Feature Bypass Vulnerability

Microsoft, Defender

Description

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.

CVSS severity

Medium (5.4/10)

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

Sourced from NVD, reflects how severe this vulnerability is if exploited, not whether it has been. Every advisory on this page is already a CISA-confirmed active exploitation case regardless of its CVSS score.

EPSS, exploit probability

Critical

76.3%

estimated chance of real-world exploitation in the next 30 days, higher than 99.5% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2023-01-03

CWE-755

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