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CVE-2026-34462— Sandboxie-Plus ProcessServer boxname stack buffer overflows via unterminated wide string copy

Quick assessment

Affected
sandboxie-plus Sandboxie
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sandboxie-Plus是Sandboxie-Plus公司的一款沙盒隔离软件。 Sandboxie-Plus 1.17.2及之前版本存在安全漏洞，该漏洞源于ProcessServer处理程序使用wcscpy复制boxname字段时未验证空终止，可能导致SbieSvc服务崩溃或SYSTEM权限代码执行。

AI Predicted 8.4 Difficulty: Easy EPSS 0.15% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
sandboxie-plus Sandboxie < 1.17.3 affected
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I. Basic Information for CVE-2026-34462

Vulnerability Information
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Vulnerability Title
Sandboxie-Plus ProcessServer boxname stack buffer overflows via unterminated wide string copy
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Sandboxie-Plus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sandboxie-Plus是Sandboxie-Plus公司的一款沙盒隔离软件。 Sandboxie-Plus 1.17.2及之前版本存在安全漏洞，该漏洞源于ProcessServer处理程序使用wcscpy复制boxname字段时未验证空终止，可能导致SbieSvc服务崩溃或SYSTEM权限代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sandboxie-plus Sandboxie < 1.17.3 -

II. Public POCs for CVE-2026-34462

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III. Intelligence Information for CVE-2026-34462

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Vendor Advisories for CVE-2026-34462 (1)

Same Patch Batch · sandboxie-plus · 2026-05-05 · 8 CVEs total

CVE-2026-32603 Sandboxie kernel driver denial of service via malformed IOCTL from sandboxed process
CVE-2026-34596 Sandboxie-Plus local privilege escalation via TOCTOU race condition in UpdUtil addon insta
CVE-2026-34458 Sandboxie-Plus privilege escalation via INI CRLF injection bypassing EditAdminOnly
CVE-2026-34527 Sandboxie-Plus EditPassword hash entropy reduced from 160 bits to 80 bits due to incorrect
CVE-2026-34459 Sandboxie-Plus sandbox escape via uninitialized memory leak and stack overflow in GetRawIn
CVE-2026-34464 Sandboxie-Plus NamedPipeServer OpenHandler stack overflow via unterminated server field
CVE-2026-34461 Sandboxie-Plus SbieIniServer RunSbieCtrl stack buffer overflow allows local privilege esca

IV. Related Vulnerabilities

Same product: Sandboxie
Same vendor: sandboxie-plus
Same weakness: CWE-121

V. Comments for CVE-2026-34462

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