Windows Elevation of Privilege Vulnerability
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.
- Published
- Jun 12, 2019
- Updated
- Jun 16, 2026
- EPSS
- 6.9% · 94th percentile
- CWE
- CWE-59
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Report tools
Action score
63
This week
Don’t wait for the next maintenance window.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 2 / 30 · 6.9%
CISA SSVC decision
- Exploitation
- active
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.8
- CNA · microsoft
- 7.8
- agree
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Mar 15, 2022. That signals real attacks, not theory.
Remediation deadline for government agencies: Apr 5, 2022.
Known to be used in ransomware campaigns.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | windows 10 1607 | cpe:2.3:o:microsoft:windows_10_1607 |
| microsoft | windows 10 1703 | cpe:2.3:o:microsoft:windows_10_1703 |
| microsoft | windows 10 1709 | cpe:2.3:o:microsoft:windows_10_1709 |
| microsoft | windows 10 1803 | cpe:2.3:o:microsoft:windows_10_1803 |
| microsoft | windows 10 1809 | cpe:2.3:o:microsoft:windows_10_1809 |
| microsoft | windows 10 1903 | cpe:2.3:o:microsoft:windows_10_1903 |
| microsoft | windows server 1709 | cpe:2.3:o:microsoft:windows_server_1709 |
| microsoft | windows server 1803 | cpe:2.3:o:microsoft:windows_server_1803 |
| microsoft | windows server 1903 | cpe:2.3:o:microsoft:windows_server_1903 |
| microsoft | windows server 2016 | cpe:2.3:o:microsoft:windows_server_2016 |
| microsoft | windows server 2019 | cpe:2.3:o:microsoft:windows_server_2019 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft windows server 1709all versions
- microsoft windows server 1803all versions
- microsoft windows server 1903all versions
- microsoft windows server 2016all versions
- microsoft windows server 2019all versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.
Microsoft Windows 10 Version 1607
- 10.0.14393.0 and later · before publicationaffected
Microsoft Windows 10 Version 1703
- 10.0.0 and later · before publicationaffected
Microsoft Windows 10 Version 1709
- 10.0.0 and later · before publicationaffected
Microsoft Windows 10 Version 1709 for 32-bit Systems
- 10.0.0 and later · before publicationaffected
Microsoft Windows 10 Version 1803
- 10.0.0 and later · before publicationaffected
Microsoft Windows 10 Version 1809
- 10.0.17763.0 and later · before publicationaffected
- 10.0.0 and later · before publicationaffected
Microsoft Windows 10 Version 1903 for 32-bit Systems
- 10.0.0 and later · before publicationaffected
Microsoft Windows 10 Version 1903 for ARM64-based Systems
- 10.0.0 and later · before publicationaffected
Microsoft Windows 10 Version 1903 for x64-based Systems
- 10.0.0 and later · before publicationaffected
Microsoft Windows Server 2016
- 10.0.14393.0 and later · before publicationaffected
Microsoft Windows Server 2016 (Server Core installation)
- 10.0.14393.0 and later · before publicationaffected
Microsoft Windows Server 2019
- 10.0.17763.0 and later · before publicationaffected
Same product
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Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Proof-of-concept repository on GitHub ×3
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:26 | 2019-06-12 |
| Proof-of-concept repository on GitHub | stars:11 | 2019-06-12 |
| Proof-of-concept repository on GitHub | stars:1 | 2019-06-16 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoCsame day
- Published
- CISA KEV+1007 d
- TodayOct 6, 2026+2673 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-59 · Improper Link Resolution Before File Access ('Link Following')CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
- Obfuscated Files or Information: HTML SmugglingT1027.006
- Obfuscated Files or Information: Embedded PayloadsT1027.009
- Boot or Logon Autostart Execution:Shortcut ModificationT1547.009
- Hide Artifacts: Resource ForkingT1564.009
- Hijack Execution Flow: Executable Installer File Permissions WeaknessT1574.005
- Hijack Execution Flow: Services File Permissions WeaknessT1574.010
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1064
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1064
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1064
Vendor advisories and official records. Exploit/PoC links are deliberately left out.