Description
A security feature bypass vulnerability exists in Microsoft Windows when the Task Scheduler service fails to properly verify client connections over RPC. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
To exploit this vulnerability, a man-in-the-middle attacker would need to send a specially crafted request to a vulnerable system.
The security update addresses the vulnerability by correcting how the Task Scheduler service validates connections.
Published: 2020-05-21
Score: 5.3 Medium
EPSS: 7.2% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2020-12000 A security feature bypass vulnerability exists in Microsoft Windows when the Task Scheduler service fails to properly verify client connections over RPC, aka 'Windows Task Scheduler Security Feature Bypass Vulnerability'.
History

Wed, 19 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
Description A security feature bypass vulnerability exists in Microsoft Windows when the Task Scheduler service fails to properly verify client connections over RPC, aka 'Windows Task Scheduler Security Feature Bypass Vulnerability'. A security feature bypass vulnerability exists in Microsoft Windows when the Task Scheduler service fails to properly verify client connections over RPC. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, a man-in-the-middle attacker would need to send a specially crafted request to a vulnerable system. The security update addresses the vulnerability by correcting how the Task Scheduler service validates connections.
Title Windows Task Scheduler Security Feature Bypass Vulnerability
First Time appeared Microsoft windows 10 1507
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows 10 1909
Microsoft windows Server 1803
Microsoft windows Server 1903
Microsoft windows Server 1909
Microsoft windows Server 2008 R2
Microsoft windows Server 2008 Sp2
Microsoft windows Server 2012 R2
CPEs cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_1803:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1903:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1909:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
Vendors & Products Microsoft windows 10 1507
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows 10 1909
Microsoft windows Server 1803
Microsoft windows Server 1903
Microsoft windows Server 1909
Microsoft windows Server 2008 R2
Microsoft windows Server 2008 Sp2
Microsoft windows Server 2012 R2
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C'}


Subscriptions

Microsoft Windows 10 Windows 10 1507 Windows 10 1607 Windows 10 1809 Windows 10 1909 Windows 7 Windows 8.1 Windows Rt 8.1 Windows Server 1803 Windows Server 1903 Windows Server 1909 Windows Server 2008 Windows Server 2008 R2 Windows Server 2008 Sp2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2016 Windows Server 2019
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-08-19T16:33:37.663Z

Reserved: 2019-11-04T00:00:00.000Z

Link: CVE-2020-1113

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-05-21T23:15:15.197

Modified: 2026-08-19T17:17:19.283

Link: CVE-2020-1113

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses