VULNERABILITY INTELLIGENCE

CVE-2026-22561

CVSS score7.8 HIGH
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-03-31
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-427
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-427

Primary references