Windows Kernel
CVE-2020-0936 — Windows Scheduled Task Elevation of Privilege Vulnerability
Executive Summary
An elevation of privilege vulnerability exists when a Windows scheduled task improperly handles file redirections. An attacker who successfully exploited this vulnerability could delete a targeted file they would not have permissions to. 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. The security update addresses the vulnerability by correcting how Windows scheduled tasks handle file redirections.
Overview
7.1
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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
None
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.4
EPSS Score
0.00737
probability of exploitation in the next 30 days
0.49625 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 8.1 for 32-bit systems 4550961 (Monthly Rollup) 4550970 (Security Only) Important Elevation of Privilege 4541509 Base: 7.1 Temporal: 6.4 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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: 7.1 Temporal: 6.4 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 2012 4550917 (Monthly Rollup) 4550971 (Security Only) Important Elevation of Privilege 4541510 Base: 7.1 Temporal: 6.4 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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: 7.1 Temporal: 6.4 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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: 7.1 Temporal: 6.4 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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: 7.1 Temporal: 6.4 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
@edwardzpeng, Jarvis_1oop of Pinduoduo Security Research Lab
References
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