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Microsoft Windows

CVE-2020-0769 — Windows CSC Service Elevation of Privilege Vulnerability

Important CVSS 7.8 EPSS 0.00928 2020-03 archive

Executive Summary

An elevation of privilege vulnerability exists when the Windows CSC Service improperly handles memory. To exploit this vulnerability, an attacker would first have to gain execution on the victim system. An attacker could then run a specially crafted application to elevate privileges. The security update addresses the vulnerability by correcting how the Windows CSC Service handles memory.

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Mar 10 2020
Last Updated Mar 10 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00928 — 0.55828 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

0.00928
probability of exploitation in the next 30 days
0.55828 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

27 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for 32-bit Systems 4540693 (Security Update) Important Elevation of Privilege Yes
Windows 10 for x64-based Systems 4540693 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for 32-bit Systems 4540670 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for x64-based Systems 4540670 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for 32-bit Systems 4540681 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for ARM64-based Systems 4540681 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for x64-based Systems 4540681 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for 32-bit Systems 4540689 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for ARM64-based Systems 4540689 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for x64-based Systems 4540689 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for 32-bit Systems 4538461 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for ARM64-based Systems 4538461 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for x64-based Systems 4538461 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for 32-bit Systems 4540673 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for ARM64-based Systems 4540673 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for x64-based Systems 4540673 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for 32-bit Systems 4540673 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for ARM64-based Systems 4540673 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for x64-based Systems 4540673 (Security Update) Important Elevation of Privilege Yes
Windows 7 for 32-bit Systems Service Pack 1 4540688 (Monthly Rollup) 4541500 (Security Only) Important Elevation of Privilege 4537820 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4540688 4541500 Windows 7 for x64-based Systems Service Pack 1 4540688 (Monthly Rollup) 4541500 (Security Only) Important Elevation of Privilege 4537820 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4540688 4541500 Windows 8.1 for 32-bit systems 4541509 (Monthly Rollup) 4541505 (Security Only) Important Elevation of Privilege 4537821 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541509 4541505 Windows 8.1 for x64-based systems 4541509 (Monthly Rollup) 4541505 (Security Only) Important Elevation of Privilege 4537821 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541509 4541505 Windows RT 8.1 4541509 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 4541506 (Monthly Rollup) 4541504 (Security Only) Important Elevation of Privilege 4537810 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541506 4541504 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 4541506 (Monthly Rollup) 4541504 (Security Only) Important Elevation of Privilege 4537810 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541506 4541504 Windows Server 2008 for x64-based Systems Service Pack 2 4541506 (Monthly Rollup) 4541504 (Security Only) Important Elevation of Privilege 4537810 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541506 4541504 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 4541506 (Monthly Rollup) 4541504 (Security Only) Important Elevation of Privilege 4537810 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541506 4541504 Windows Server 2008 R2 for x64-based Systems Service Pack 1 4540688 (Monthly Rollup) 4541500 (Security Only) Important Elevation of Privilege 4537820 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4540688 4541500 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4540688 (Monthly Rollup) 4541500 (Security Only) Important Elevation of Privilege 4537820 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4540688 4541500 Windows Server 2012 4541510 (Monthly Rollup) 4540694 (Security Only) Important Elevation of Privilege 4537814 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541510 4540694 Windows Server 2012 (Server Core installation) 4541510 (Monthly Rollup) 4540694 (Security Only) Important Elevation of Privilege 4537814 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541510 4540694 Windows Server 2012 R2 4541509 (Monthly Rollup) 4541505 (Security Only) Important Elevation of Privilege 4537821 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541509 4541505 Windows Server 2012 R2 (Server Core installation) 4541509 (Monthly Rollup) 4541505 (Security Only) Important Elevation of Privilege 4537821 Base: 7.8 Temporal: 7.0 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes 4541509 4541505 Windows Server 2016 4540670 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 4540670 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 4538461 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 4538461 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1803 (Server Core Installation) 4540689 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1903 (Server Core installation) 4540673 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1909 (Server Core installation) 4540673 (Security Update) Important Elevation of Privilege Yes

Patches

7 patches
Article Type Restart
4540693 Security Update Yes
4540670 Security Update Yes
4540681 Security Update Yes
4540689 Security Update Yes
4538461 Security Update Yes
4540673 Security Update Yes
4541509 Monthly Rollup Yes

Known Exploits

Acknowledgments

None

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