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CVE-2019-1161

24
FAUCET Score

CVE-2019-1161 is an elevation of privilege vulnerability affecting Microsoft Defender's MpSigStub.exe, allowing arbitrary file deletion. An attacker with local access could run a crafted command, leading to the deletion of protected files when MpSigStub.exe next executes. With a CVSS score of 7.1 (HIGH), this vulnerability requires local access and has high impacts on integrity and availability. There is no known active exploitation, public exploit code, or Metasploit/Nuclei modules, though it has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:windows_defender:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:forefront_endpoint_protection_2010:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:security_essentials:-:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:microsoft:system_center_endpoint_protection:*:*:*:*:*:*:*:*
2012CPE matchmatch criteria
cpe:2.3:a:microsoft:system_center_endpoint_protection:2012:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.90%
Probability of exploitation in next 30 days
EPSS Percentile
55.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0090 is in the 90th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

microsoft2019-Aug/CVE-2019-1161Important

Microsoft Defender Elevation of Privilege Vulnerability

Aug 13, 2019

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2019-1161
PatchVendor Advisory