CVE-2026-34462 Details
Description
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.
A stack-based buffer overflow vulnerability has been identified in Sandboxie-Plus versions through 1.17.2. The issue arises in several ProcessServer handlers, including KillAllHandler, SuspendAllHandler, and RunSandboxedHandler. These handlers improperly handle WCHAR boxname fields by copying them into larger stack buffers without ensuring proper null termination. This flaw can be exploited by sending oversized packets through the service pipe, which accepts variable-length data. The vulnerability allows for a crash of the SbieSvc service and could potentially be exploited for code execution with SYSTEM privileges.
Users are advised to update to Sandboxie-Plus version 1.17.3, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 7, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-9cjg-vh9m-hhx4 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
| CWE-170 | Improper Null Termination | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| sandboxie-plus sandboxie | < 1.17.3 |
CPE
Remediation
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Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 7, 2026 | Initial Analysis | [email protected] |
| May 7, 2026 | CVE Modified | CISA-ADP |
| May 6, 2026 | CVE Modified | CISA-ADP |
| May 5, 2026 | New CVE Received | [email protected] |