Important CVSS 5.5 EPSS 0.0044 2025-11 archive

Executive Summary

Out-of-bounds read in Windows Hyper-V allows an authorized attacker to disclose information locally.

Overview

5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Information Disclosure
Released Nov 11 2025
Last Updated Nov 11 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.0044 — 0.35 percentile

CVSS Vector

ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 4.8

EPSS Score

0.0044
probability of exploitation in the next 30 days
0.35 percentile - updated 2026-06-20
View on FIRST.org

Affected Products

19 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1607 for x64-based Systems 5068864 (Security Update) Important Information Disclosure Yes
Windows 10 Version 1809 for x64-based Systems 5068791 (Security Update) Important Information Disclosure Yes
Windows 10 Version 21H2 for x64-based Systems 5068781 (Security Update) Important Information Disclosure Yes
Windows 10 Version 22H2 for x64-based Systems 5068781 (Security Update) Important Information Disclosure Yes
Windows 11 Version 23H2 for ARM64-based Systems 5068865 (Security Update) Important Information Disclosure Yes
Windows 11 Version 23H2 for x64-based Systems 5068865 (Security Update) Important Information Disclosure Yes
Windows 11 Version 24H2 for ARM64-based Systems 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Information Disclosure Yes
Windows 11 Version 24H2 for x64-based Systems 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Information Disclosure Yes
Windows 11 Version 25H2 for ARM64-based Systems 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Information Disclosure Yes
Windows 11 Version 25H2 for x64-based Systems 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Information Disclosure Yes
Windows Server 2016 5068864 (Security Update) Important Information Disclosure Yes
Windows Server 2016 (Server Core installation) 5068864 (Security Update) Important Information Disclosure Yes
Windows Server 2019 5068791 (Security Update) Important Information Disclosure Yes
Windows Server 2019 (Server Core installation) 5068791 (Security Update) Important Information Disclosure Yes
Windows Server 2022 5068787 (Security Update) 5068840 (Security Hotpatch Update) Important Information Disclosure Yes
Windows Server 2022 (Server Core installation) 5068787 (Security Update) 5068840 (Security Hotpatch Update) Important Information Disclosure Yes
Windows Server 2022, 23H2 Edition (Server Core installation) 5068779 (Security Update) Important Information Disclosure Yes
Windows Server 2025 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Information Disclosure Yes
Windows Server 2025 (Server Core installation) 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Information Disclosure Yes

Patches

7 patches
Article Type Restart
5068864 Security Update Yes
5068791 Security Update Yes
5068781 Security Update Yes
5068865 Security Update Yes
5068861 (Security Update) 5068966 Security Update Yes
5068787 (Security Update) 5068840 Security Update Yes
5068779 Security Update Yes

Known Exploits

Acknowledgments

pwnky, pwnky