Description

Uncontrolled search path elements in Anthropic Claude for Windows installer (Claude Setup.exe) versions prior to 1.1.3363 allow local privilege escalation via DLL search-order hijacking. The installer loads DLLs (e.g., profapi.dll) from its own directory after UAC elevation, enabling arbitrary code execution if a malicious DLL is planted alongside the installer.

INFO

Published Date :

2026-03-31T15:30:38.876Z

Last Modified :

2026-03-31T18:13:52.328Z

Source :

hackerone
AFFECTED PRODUCTS

The following products are affected by CVE-2026-22561 vulnerability.

Vendors Products
Anthropic
  • Claude
  • Claude Desktop
Microsoft
  • Windows
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-22561.

URL Resource
https://trust.anthropic.com/resources?s=1cvig6ldp3zvuj1yffzr11&name=cve-2026-22561-dll-search-order-hijacking-in-claude-for-windows-installer cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact