FKIE_CVE-2026-34462

Vulnerability from fkie_nvd - Published: 2026-05-05 20:16 - Updated: 2026-05-07 19:47
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, several ProcessServer handlers (KillAllHandler, SuspendAllHandler, and RunSandboxedHandler) copy a WCHAR boxname[34] field from request structures into WCHAR[40] stack buffers using wcscpy without verifying null termination. Because the service pipe accepts variable-length packets larger than the request structure, an attacker can fill the boxname field with non-zero data and append additional controlled wide characters after the structure. wcscpy then reads past the fixed field and overflows the destination stack buffer. The service pipe is created with a NULL DACL, allowing any local process to connect, and the unsafe copy occurs before authorization checks. This can lead to a crash of the SbieSvc service or potential code execution as SYSTEM. This issue has been fixed in version 1.17.3.
References
security-advisories@github.comhttps://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-9cjg-vh9m-hhx4Exploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
sandboxie-plus sandboxie *
To clipboard 

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  ],
  "id": "CVE-2026-34462",
  "lastModified": "2026-05-07T19:47:30.260",
  "metrics": {
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          "valueDensity": "NOT_DEFINED",
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