Important CVSS 7.8 EPSS 0.00729 2020-07 archive

Executive Summary

An elevation of privilege vulnerability exists in the way that the Windows Subsystem for Linux handles files. An attacker who successfully exploited the vulnerability could execute code with elevated privileges. To exploit the vulnerability, an attacker would first need code execution on a victim system. An attacker could then run a specially crafted application. The security update addresses the vulnerability by correcting how the Windows Subsystem for Linux handles files.

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Jul 14 2020
Last Updated Jul 14 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00729 — 0.49339 percentile
NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.0

EPSS Score

0.00729
probability of exploitation in the next 30 days
0.49339 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

3 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 2004 for ARM64-based Systems 4565503 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 2004 for x64-based Systems 4565503 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 2004 (Server Core installation) 4565503 (Security Update) Important Elevation of Privilege Yes

Patches

1 patch
Article Type Restart
4565503 Security Update Yes

Known Exploits

Acknowledgments