OnlyFm252
Windows Kernel

CVE-2020-1015 — Windows Elevation of Privilege Vulnerability

Important CVSS 7.8 EPSS 0.02549 2020-04 archive

Executive Summary

An elevation of privilege vulnerability exists in the way that the User-Mode Power Service (UMPS) handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions. To exploit the vulnerability, a locally authenticated attacker could run a specially crafted application. The security update addresses the vulnerability by ensuring the User-Mode Power Service properly handles objects in memory.

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Apr 14 2020
Last Updated Apr 14 2020
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.02549 — 0.82984 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

0.02549
probability of exploitation in the next 30 days
0.82984 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 4550930 (Security Update) Important Elevation of Privilege Yes
Windows 10 for x64-based Systems 4550930 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for 32-bit Systems 4550929 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for x64-based Systems 4550929 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for 32-bit Systems 4550927 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for ARM64-based Systems 4550927 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for x64-based Systems 4550927 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for 32-bit Systems 4550922 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for ARM64-based Systems 4550922 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for x64-based Systems 4550922 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for 32-bit Systems 4549949 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for ARM64-based Systems 4549949 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for x64-based Systems 4549949 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for 32-bit Systems 4549951 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for ARM64-based Systems 4549951 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1903 for x64-based Systems 4549951 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for 32-bit Systems 4549951 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for ARM64-based Systems 4549951 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1909 for x64-based Systems 4549951 (Security Update) Important Elevation of Privilege Yes
Windows 7 for 32-bit Systems Service Pack 1 4550964 (Monthly Rollup) 4550965 (Security Only) Important Elevation of Privilege 4540688 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 4550964 4550965 Windows 7 for x64-based Systems Service Pack 1 4550964 (Monthly Rollup) 4550965 (Security Only) Important Elevation of Privilege 4540688 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 4550964 4550965 Windows 8.1 for 32-bit systems 4550961 (Monthly Rollup) 4550970 (Security Only) Important Elevation of Privilege 4541509 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 4550961 4550970 Windows 8.1 for x64-based systems 4550961 (Monthly Rollup) 4550970 (Security Only) Important Elevation of Privilege 4541509 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 4550961 4550970 Windows RT 8.1 4550961 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 4550964 (Monthly Rollup) 4550965 (Security Only) Important Elevation of Privilege 4540688 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 4550964 4550965 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4550964 (Monthly Rollup) 4550965 (Security Only) Important Elevation of Privilege 4540688 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 4550964 4550965 Windows Server 2012 4550917 (Monthly Rollup) 4550971 (Security Only) Important Elevation of Privilege 4541510 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 4550917 4550971 Windows Server 2012 (Server Core installation) 4550917 (Monthly Rollup) 4550971 (Security Only) Important Elevation of Privilege 4541510 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 4550917 4550971 Windows Server 2012 R2 4550961 (Monthly Rollup) 4550970 (Security Only) Important Elevation of Privilege 4541509 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 4550961 4550970 Windows Server 2012 R2 (Server Core installation) 4550961 (Monthly Rollup) 4550970 (Security Only) Important Elevation of Privilege 4541509 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 4550961 4550970 Windows Server 2016 4550929 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 4550929 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 4549949 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 4549949 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1803 (Server Core Installation) 4550922 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1903 (Server Core installation) 4549951 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1909 (Server Core installation) 4549951 (Security Update) Important Elevation of Privilege Yes

Patches

7 patches
Article Type Restart
4550930 Security Update Yes
4550929 Security Update Yes
4550927 Security Update Yes
4550922 Security Update Yes
4549949 Security Update Yes
4549951 Security Update Yes
4550961 Monthly Rollup Yes

Known Exploits

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