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CVE-2019-1064

HIGHCVSS 7.8/10Actively ExploitedEPSS 6.89%

Last modified

CVE-2019-1064 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. CISA has confirmed active exploitation in the wild. EPSS estimates a 6.89% chance of exploitation in the next 30 days.

Description

An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.

Metrics

CVSS 3.1
7.8/10

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

EPSS Probability
6.89%

93.2th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .

Weakness Enumeration

Affected Software

VendorProductVersions
MicrosoftWindows 10 1607All versions
MicrosoftWindows 10 1703All versions
MicrosoftWindows 10 1709All versions
MicrosoftWindows 10 1803All versions
MicrosoftWindows 10 1809All versions
MicrosoftWindows 10 1903All versions
MicrosoftWindows Server 1709All versions
MicrosoftWindows Server 1803All versions
MicrosoftWindows Server 1903All versions
MicrosoftWindows Server 2016All versions
MicrosoftWindows Server 2019All versions

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2019-1064?
An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.
How severe is CVE-2019-1064?
CVE-2019-1064 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 6.89% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2019-1064?
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-2019-1064?

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

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Source: NVD / NIST