# CVE-2026-22561

> CVE-2026-22561. CVSS 7.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-22561
Last updated: 2026-07-24T20:10:00Z

- Published: 2026-03-31 15:30 UTC · Updated: 2026-07-24 20:10 UTC · Assigner: hackerone
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 0.18%, 7th percentile (scored 2026-10-25)
- CISA KEV: no

## 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.

## Affected vendors and products

- Anthropic: Claude Desktop - Windows

## Tracked companies

- [Anthropic](https://rewindex.com/company/anthropic.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-22561)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-22561)
- [https://trust.anthropic.com/resources?s=1cvig6ldp3zvuj1yffzr11&name=cve-2026-22561-dll-search-order-hijacking-in-claude-for-windows-installer](https://trust.anthropic.com/resources?s=1cvig6ldp3zvuj1yffzr11&name=cve-2026-22561-dll-search-order-hijacking-in-claude-for-windows-installer)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-22561 · Markdown: https://rewindex.com/cve/CVE-2026-22561.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-22561 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:16:23.251Z