Critical CVSS 8.8 EPSS 0.00778 2026-04 archive

Executive Summary

Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Overview

8.8
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Apr 14 2026
Last Updated Apr 14 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00778 — 0.51023 percentile
NVD CVSS 8.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.7

EPSS Score

0.00778
probability of exploitation in the next 30 days
0.51023 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

33 affected products
Product KB Article Severity Impact Restart Required
Remote Desktop client for Windows Desktop Release Notes (Security Update) Critical Remote Code Execution Maybe
Windows 10 Version 1607 for 32-bit Systems 5082198 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1607 for x64-based Systems 5082198 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1809 for 32-bit Systems 5082123 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 1809 for x64-based Systems 5082123 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 21H2 for 32-bit Systems 5082200 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 21H2 for ARM64-based Systems 5082200 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 21H2 for x64-based Systems 5082200 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 22H2 for 32-bit Systems 5082200 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 22H2 for ARM64-based Systems 5082200 (Security Update) Critical Remote Code Execution Yes
Windows 10 Version 22H2 for x64-based Systems 5082200 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 23H2 for ARM64-based Systems 5082052 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 23H2 for x64-based Systems 5082052 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 24H2 for ARM64-based Systems 5083769 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 24H2 for x64-based Systems 5083769 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 25H2 for ARM64-based Systems 5083769 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 25H2 for x64-based Systems 5083769 (Security Update) Critical Remote Code Execution Yes
Windows 11 Version 26H1 for ARM64-based Systems 5083768 (Security Update) Critical Remote Code Execution Yes
Windows 11 version 26H1 for x64-based Systems 5083768 (Security Update) Critical Remote Code Execution Yes
Windows App Client for Windows Desktop Release Notes (Security Update) Critical Remote Code Execution Maybe
Windows Server 2012 5082127 (Monthly Rollup) Critical Remote Code Execution Yes
Windows Server 2012 (Server Core installation) 5082127 (Monthly Rollup) Critical Remote Code Execution Yes
Windows Server 2012 R2 5082126 (Monthly Rollup) Critical Remote Code Execution Yes
Windows Server 2012 R2 (Server Core installation) 5082126 (Monthly Rollup) Critical Remote Code Execution Yes
Windows Server 2016 5082198 (Security Update) Critical Remote Code Execution Yes
Windows Server 2016 (Server Core installation) 5082198 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 5082123 (Security Update) Critical Remote Code Execution Yes
Windows Server 2019 (Server Core installation) 5082123 (Security Update) Critical Remote Code Execution Yes
Windows Server 2022 5082142 (Security Update) Critical Remote Code Execution Yes
Windows Server 2022 (Server Core installation) 5082142 (Security Update) Critical Remote Code Execution Yes
Windows Server 2022, 23H2 Edition (Server Core installation) 5082060 (Security Update) Critical Remote Code Execution Yes
Windows Server 2025 5082063 (Security Update) Critical Remote Code Execution Yes
Windows Server 2025 (Server Core installation) 5082063 (Security Update) Critical Remote Code Execution Yes

Patches

12 patches
Article Type Restart
Release Notes Security Update Maybe
5082198 Security Update Yes
5082123 Security Update Yes
5082200 Security Update Yes
5082052 Security Update Yes
5083769 Security Update Yes
5083768 Security Update Yes
5082127 Monthly Rollup Yes
5082126 Monthly Rollup Yes
5082142 Security Update Yes
5082060 Security Update Yes
5082063 Security Update Yes

Known Exploits

Acknowledgments

pwn2addr