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CVE-2019-1161

Microsoft Defender Elevation of Privilege Vulnerability

Published: Aug 14, 2019Updated: Feb 20, 2026 Sources: CVE List NVD BDUNVD-CWE-noinfo
NVD MITRE
7.1CVSSHIGH
EPSS Score
0.9%
Top 45.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

Microsoft Forefront Endpoint Protection 2010Microsoft
On-prem
Operating Systems / windows
Microsoft System Center Endpoint ProtectionMicrosoft
On-prem
Operating Systems / windows
Microsoft System Center 2012 R2 Endpoint ProtectionMicrosoft
On-prem
Operating Systems / windows
Microsoft Security EssentialsMicrosoft
On-prem
Operating Systems / windows
Microsoft System Center 2012 Endpoint ProtectionMicrosoft
On-prem
Operating Systems / windows
microsoftcommercialUSOperating Systems
and 8 more affected products View all →

Exploitability

Official Patch Available

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1161
portal.msrc.microsoft.com
https://www.tenable.com/plugins/nessus/127910
tenable.com
https://www.cybersecurity-help.cz/vdb/SB2019081412
cybersecurity-help.cz

Timeline

Published
Aug 14, 2019
Last Updated
Feb 20, 2026

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