Important CVSS 7 EPSS 0.00243 2026-04 archive

Executive Summary

Stack-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

Overview

7
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Apr 14 2026
Last Updated Apr 14 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00243 — 0.15185 percentile
NVD CVSS 7 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.1

EPSS Score

0.00243
probability of exploitation in the next 30 days
0.15185 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

2 affected products
Product KB Article Severity Impact Restart Required
Windows 11 Version 26H1 for ARM64-based Systems 5083768 (Security Update) Important Elevation of Privilege Yes
Windows 11 version 26H1 for x64-based Systems 5083768 (Security Update) Important Elevation of Privilege Yes

Patches

1 patch
Article Type Restart
5083768 Security Update Yes

Known Exploits

Acknowledgments