CVE-2019-1170

Name: CVE-2019-1170
Creator: NVD / NIST
Published: 2019-08-14T21:15:16+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.9/10EPSS 2.43%

Last modified Jun 17, 2026

CVE-2019-1170 is a high-severity vulnerability rated 7.9/10 on the CVSS scale. An elevation of privilege vulnerability exists when reparse points are created by sandboxed processes allowing sandbox escape. An attacker who successfully exploited the vulnerability could use the sandbox escape to elevate privileges on an affected system. To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system. The security update addresses the vulnerability by preventing sandboxed processes from creating reparse points targeting inaccessible files.. EPSS estimates a 2.43% chance of exploitation in the next 30 days.

Description

An elevation of privilege vulnerability exists when reparse points are created by sandboxed processes allowing sandbox escape. An attacker who successfully exploited the vulnerability could use the sandbox escape to elevate privileges on an affected system. To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system. The security update addresses the vulnerability by preventing sandboxed processes from creating reparse points targeting inaccessible files.

Metrics

CVSS 3.1

7.9/10

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

EPSS Probability

2.43%

82.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10	1809
Microsoft	Windows 10	1903
Microsoft	Windows Server 2016	1903
Microsoft	Windows Server 2019	All versions

References

http://packetstormsecurity.com/files/154192/Microsoft-Windows-SET_REPARSE_POINT_EX-Mount-Point-Security-Feature-Bypass.htmlThird Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1170Patch, Vendor Advisory
http://packetstormsecurity.com/files/154192/Microsoft-Windows-SET_REPARSE_POINT_EX-Mount-Point-Security-Feature-Bypass.htmlThird Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1170Patch, Vendor Advisory

Timeline

Published: Aug 14, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-1170?

How severe is CVE-2019-1170?

CVE-2019-1170 has a CVSS score of 7.9/10 (HIGH severity). The EPSS model estimates a 2.43% probability of exploitation in the next 30 days.

How do I fix CVE-2019-1170?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-1170?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST