{"id":"CVE-2026-22561","aliases":["EUVD-2026-17476","GHSA-3c2p-6j48-gmm4"],"status":"published","title":"Uncontrolled search path elements in Anthropic Claude for Windows installer (Claude Setup.exe)...","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.","severity":{"version":"4.0","score":4.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00184,"percentile":0.08073,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-427"],"published":"2026-03-31T15:30:38Z","modified":"2026-07-24T20:10:00Z","products":[{"vendor":"anthropic","product":"claude"},{"vendor":"anthropic","product":"claude desktop - windows"}],"references":[{"url":"https://trust.anthropic.com/resources?s=1cvig6ldp3zvuj1yffzr11\u0026name=cve-2026-22561-dll-search-order-hijacking-in-claude-for-windows-installer","tags":["Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22561"},{"url":"https://github.com/advisories/GHSA-3c2p-6j48-gmm4"}],"sources":{"cve":[{"id":"CVE-2026-22561","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.","status":"published","published":"2026-03-31T15:30:38.876Z","modified":"2026-05-10T13:58:31.956Z","cvss":[{"version":"4.0","score":4.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","level":"medium","assessor":"cna"}],"cwes":["CWE-427"],"updated_at":"2026-11-02T13:39:05.585774Z"}],"euvd":[{"id":"EUVD-2026-17476","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.","status":"published","published":"2026-03-31T15:30:38Z","modified":"2026-05-10T13:58:31Z","cvss":[{"version":"4.0","score":4.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","level":"medium"}],"updated_at":"2026-11-02T19:05:13.690762Z"}],"ghsa":[{"id":"GHSA-3c2p-6j48-gmm4","title":"Uncontrolled search path elements in Anthropic Claude for Windows installer (Claude Setup.exe)...","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.","status":"published","published":"2026-03-31T18:31:31Z","modified":"2026-04-06T18:34:06Z","cvss":[{"version":"4.0","score":4.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-427"],"updated_at":"2026-11-02T15:07:10.409602Z"}],"nvd":[{"id":"CVE-2026-22561","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.","status":"published","published":"2026-03-31T16:16:28.85Z","modified":"2026-07-24T20:10:00.147Z","cvss":[{"version":"4.0","score":4.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-427"],"updated_at":"2026-11-02T14:12:12.261218Z"}]}}