CVE-2026-34462

HIGH EPSS 7.1%
Published May 5, 20261mo ago · Modified Jun 17, 20262w ago
7.3 CVSS 4.0
High
Find Similar
Published May 5, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.3
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
7.1% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-121
CWE-170

Affected Products 1

VendorProductVersionRange
sandboxie-plussandboxie* <1.17.3

References 1

  • github.com https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-9cjg-vh9m-hhx4
    ExploitMitigationVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.