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Windows Shell

CVE-2020-0870 — Shell infrastructure component Elevation of Privilege Vulnerability

Important CVSS 7.8 EPSS 0.00996 2020-09 archive

Executive Summary

An elevation of privilege vulnerability exists when the Shell infrastructure component improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The update addresses the vulnerability by correcting the way in which the Shell infrastructure component handles objects in memory and preventing unintended elevation from lower integrity application.

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Sep 8 2020
Last Updated Sep 8 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00996 — 0.58133 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

0.00996
probability of exploitation in the next 30 days
0.58133 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

19 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1607 for 32-bit Systems 4577015 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for x64-based Systems 4577015 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for 32-bit Systems 4577041 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for ARM64-based Systems 4577041 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for x64-based Systems 4577041 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for 32-bit Systems 4577032 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for ARM64-based Systems 4577032 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for x64-based Systems 4577032 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for 32-bit Systems 4570333 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for ARM64-based Systems 4570333 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for x64-based Systems 4570333 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for 32-bit Systems 4574727 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for ARM64-based Systems 4574727 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for x64-based Systems 4574727 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for 32-bit Systems 4574727 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for ARM64-based Systems 4574727 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for x64-based Systems 4574727 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 4577015 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 4570333 (Security Update) Important Elevation of Privilege Yes

Patches

5 patches
Article Type Restart
4577015 Security Update Yes
4577041 Security Update Yes
4577032 Security Update Yes
4570333 Security Update Yes
4574727 Security Update Yes

Known Exploits

Acknowledgments

anonymous researcher

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