CVE-2019-1064

CVE-2019-1064 is a high-severity vulnerability in Microsoft Windows 10 1607 with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-15). The underlying weakness is classified as CWE-59.

Key facts

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.

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 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-1064 being actively exploited?
Yes. CVE-2019-1064 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-15, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2019-1064?
CVE-2019-1064 primarily affects Microsoft Windows 10 1607. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-1064?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2019-1064 have an EU (EUVD) identifier?
Yes. CVE-2019-1064 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-9646. It is also flagged as exploited in the EUVD (since 2022-03-15).
When was CVE-2019-1064 published?
CVE-2019-1064 was published on 2019-06-12 and last updated on 2026-06-17.

References

Affected products (21)

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