CVE-2025-64721
CriticalSummary
Sandboxie versions 1.16.6 and below contain a heap overflow vulnerability in the SbieSvc.exe service. By manipulating the value_len parameter, an attacker from a sandboxed process can execute arbitrary code with SYSTEM privileges, fully compromising the host. The issue is fixed in version 1.16.7.
Risk Assessment
An attacker from within the sandbox can gain full control over the operating system, leading to complete compromise of the organization.
Recommendation
It is recommended to immediately update Sandboxie to version 1.16.7 or later to eliminate the heap overflow risk.
Original NVD description (English source)
Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. In versions 1.16.6 and below, the SYSTEM-level service SbieSvc.exe exposes SbieIniServer::RC4Crypt to sandboxed processes. The handler adds a fixed header size to a caller-controlled value_len without overflow checking. A large value_len (e.g., 0xFFFFFFF0) wraps the allocation size, causing a heap overflow when attacker data is copied into the undersized buffer. This allows sandboxed processes to execute arbitrary code as SYSTEM, fully compromising the host. This issue is fixed in version 1.16.7.