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Case File

CVE-2021-40449

HIGH · CVSS 7.8 EPSS 74.13% CISA KEV · Actively Exploited Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-13 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities catalog, indicating confirmed active exploitation in the wild. Public exploit code or proof-of-concept references have been detected in its references. Its EPSS score suggests a 74.1% probability of exploitation in the next 30 days.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

External Security References

Note: these links are listed for security research and verification purposes only.

CISA KEV Details

Status: This CVE is listed in CISA's Known Exploited Vulnerabilities catalog.

Ransomware use: Known

Added to KEV: 2021-11-17

Required action: Apply updates per vendor instructions.

CVE
CVE-2021-40449
Severity
HIGH
CVSS
7.8
EPSS
74.13%

Original NVD Description

Win32k Elevation of Privilege Vulnerability

Related CVEs

Other vulnerabilities affecting the same vendor(s)