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CVE-2019-1064 is an elevation-of-privilege vulnerability in Windows AppX Deployment Service (AppXSVC) caused by improper handling of hard links. An attacker who has logged on to an affected system can execute a specially crafted application to run processes in an elevated context. Successful exploitation can enable program installation and unauthorized viewing, modification, or deletion of data.
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What an attacker gets, and what they’ve been doing with it.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a proof-of-concept (PoC) exploit for CVE-2019-1064, a local privilege escalation vulnerability in Microsoft Windows AppXSVC. The main exploit logic is implemented in 'AppXSVC_poc/Exploit.cs', a C# program that leverages NTFS hardlinks and directory manipulation to exploit a race condition in the AppXSVC service. The exploit requires a target file as an argument and checks that the SYSTEM account has full control over it, but the current user does not. It also checks that Cortana is enabled via a registry key. The exploit deletes the Cortana LocalState directory, creates a hardlink from a file in that directory to the target file, and relies on the service to rewrite DACLs, potentially granting the current user full control over the target file. The repository is structured as a Visual Studio C# project, with supporting configuration and dependency files. No network or remote attack vectors are present; this is a purely local privilege escalation exploit. The endpoints of interest are the Cortana LocalState directory and the relevant Windows registry key.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A historical AppX Deployment Service vulnerability involving symbolic-link validation failure, cited as similar prior Microsoft security history.
A Windows privilege escalation vulnerability used in Conti's post-exploitation activities.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.