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CVE-2026-22561

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2ae27ad45db08424c8ba8af7a95261e2cda7d2827f61693dd903f45c62dda019
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Claude Desktop - Windows","vendor":"Anthropic","versions":[{"lessThan":"1.1.3363","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:78e8407658c6cfea5c5a0e2d3a9a6dad17ffcdb12cd2563c67a3090e00e306ac · sha256:d371bc1eaa10e5ca… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":4.7,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:78e8407658c6cfea5c5a0e2d3a9a6dad17ffcdb12cd2563c67a3090e00e306ac · sha256:d371bc1eaa10e5ca… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-427","description":"CWE-427 Uncontrolled Search Path Element","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:78e8407658c6cfea5c5a0e2d3a9a6dad17ffcdb12cd2563c67a3090e00e306ac · sha256:d371bc1eaa10e5ca… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://trust.anthropic.com/resources?s=1cvig6ldp3zvuj1yffzr11&name=cve-2026-22561-dll-search-order-hijacking-in-claude-for-windows-installer"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:78e8407658c6cfea5c5a0e2d3a9a6dad17ffcdb12cd2563c67a3090e00e306ac · sha256:d371bc1eaa10e5ca… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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