CVE-2019-1161

Microsoft Defender Elevation of Privilege Vulnerability

Published Aug 14, 2019 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Description

An elevation of privilege vulnerability exists when the MpSigStub.exe for Defender allows file deletion in arbitrary locations.
To exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted command that could exploit the vulnerability and delete protected files on an affected system once MpSigStub.exe ran again.
The update addresses the vulnerability and blocks the arbitrary deletion.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Microsoft

Microsoft Forefront Endpoint Protection 2010

affected

Version	Status	Constraints
`N/A`	affected	—

Microsoft

Microsoft System Center Endpoint Protection

affected

Version	Status	Constraints
`N/A`	affected	—

Microsoft

Microsoft System Center 2012 R2 Endpoint Protection

affected

Version	Status	Constraints
`N/A`	affected	—

Microsoft

Microsoft Security Essentials

affected

Version	Status	Constraints
`N/A`	affected	—

Microsoft

Microsoft System Center 2012 Endpoint Protection

affected

Version	Status	Constraints
`N/A`	affected	—

Microsoft

Windows Defender

affected

Version	Status	Constraints
`N/A`	affected	—

Configuration 1 [-]

AND

cpe:2.3:a:microsoft:windows_defender:-:*:*:*:*:*:*:*

OR	cpe:2.3:o:microsoft:windows_10:-:::::::*
	cpe:2.3:o:microsoft:windows_10:1607:::::::*
	cpe:2.3:o:microsoft:windows_10:1703:::::::*
	cpe:2.3:o:microsoft:windows_10:1709:::::::*
	cpe:2.3:o:microsoft:windows_7:-:sp1::::::
	cpe:2.3:o:microsoft:windows_8.1:-:::::::*
	cpe:2.3:o:microsoft:windows_rt_8.1:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2008:-:sp2::::::
	cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:::::itanium:*
	cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:::::x64:*
	cpe:2.3:o:microsoft:windows_server_2012:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*
	cpe:2.3:o:microsoft:windows_server_2016:-:::::::*

Configuration 2 [-]

OR	cpe:2.3:a:microsoft:forefront_endpoint_protection_2010:-:::::::*
	cpe:2.3:a:microsoft:security_essentials:-:::::::*
	cpe:2.3:a:microsoft:system_center_endpoint_protection::::::::
	cpe:2.3:a:microsoft:system_center_endpoint_protection:2012:-::::::
	cpe:2.3:a:microsoft:system_center_endpoint_protection:2012:r2::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2019-9733	An elevation of privilege vulnerability exists when the MpSigStub.exe for Defender allows file deletion in arbitrary locations. To exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted command that could exploit the vulnerability and delete protected files on an affected system once MpSigStub.exe ran again. The update addresses the vulnerability and blocks the arbitrary deletion.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Local

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.951% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1161

History

Feb 20, 2026 9:00 PM Description updated View changes

Type	Values Removed	Values Added
Description	An elevation of privilege vulnerability exists when the MpSigStub.exe for Defender allows file deletion in arbitrary locations. To exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted command that could exploit the vulnerability and delete protected files on an affected system once MpSigStub.exe ran again. The update addresses the vulnerability and blocks the arbitrary deletion.	An elevation of privilege vulnerability exists when the MpSigStub.exe for Defender allows file deletion in arbitrary locations. To exploit the vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted command that could exploit the vulnerability and delete protected files on an affected system once MpSigStub.exe ran again. The update addresses the vulnerability and blocks the arbitrary deletion.

Subscriptions

Microsoft Forefront Endpoint Protection 2010 Security Essentials System Center Endpoint Protection Windows 10 Windows 7 Windows 8.1 Windows Defender Windows Rt 8.1 Windows Server 2008 Windows Server 2012 Windows Server 2016

Weaknesses