Uncontrolled search path in anthropics Claude Desktop - Windows
Priority LOW 21CWE-427Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-427.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00184 8th percentileScored 2026-11-07
Fix Fixed Claude Desktop - Windows (Anthropic): 1.1.3363
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| anthropics | Claude Desktop - Windows | before 1.1.3363 | 1.1.3363 | Patch available | CNA |
- Claude Desktop - Windows Vendoranthropics Affected before 1.1.3363 Fixed in 1.1.3363 Patch available CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:anthropic:claude:*:*:*:*:*:*:*:* | before 1.1.3363 | Vulnerable | anthropics |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:anthropic:claude:*:*:*:*:*:*:*:* Versions before 1.1.3363 Vulnerable ·anthropics
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
- Fix · CNA Claude Desktop - Windows (Anthropic) Fixed in 1.1.3363
Timeline
- 2026-10-02 Threatist record created from CVE-2026-22561
- 2026-10-03 Alias added: GHSA-3c2p-6j48-gmm4
References
Sources
- CVE-2026-22561 · CVE Program
- CVE-2026-22561 · NVD
- FIRST EPSS
- GHSA-3c2p-6j48-gmm4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences