Important CVSS 5.5 EPSS 0.02334 📢 Publicly disclosed 2020-10 archive

Executive Summary

An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would not allow an attacker to execute code or to elevate user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system. The update addresses the vulnerability by correcting how the Windows kernel handles objects in memory.

Overview

5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Information Disclosure
Released Oct 13 2020
Last Updated Oct 13 2020
Publicly Disclosed Yes
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.02334 — 0.8134 percentile

CVSS Vector

ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 5.0

EPSS Score

0.02334
probability of exploitation in the next 30 days
0.8134 percentile - updated 2026-06-20
View on FIRST.org

Affected Products

4 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 2004 for 32-bit Systems 4579311 (Security Update) Important Information Disclosure Yes
Windows 10 Version 2004 for ARM64-based Systems 4579311 (Security Update) Important Information Disclosure Yes
Windows 10 Version 2004 for x64-based Systems 4579311 (Security Update) Important Information Disclosure Yes
Windows Server, version 2004 (Server Core installation) 4579311 (Security Update) Important Information Disclosure Yes

Patches

1 patch
Article Type Restart
4579311 Security Update Yes

Known Exploits

Acknowledgments

Jonas Lykkegård