CVE-2026-22561

HIGH

Claude Desktop - Windows < 1.1.3363 - Local Privilege Escalation via DLL Search-Order Hijacking

Title source: llm

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.

References (1)

Core 1

Core References

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

Scores

CVSS v3 7.8

EPSS 0.0018

EPSS Percentile 7.4%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-427

Status published

Products (3)

anthropic/claude < 1.1.3363

Anthropic/Claude Desktop - Windows < 1.1.3363

Anthropic/Claude Desktop - Windows 1.1.3363

Published Mar 31, 2026

Tracked Since Mar 31, 2026