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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/sandboxie-plus/Sandboxie/commit/000492f8c411d24292f1b977a107994347bc7dfa Patch
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-w476-j57g-96vp Exploit, Vendor Advisory
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-w476-j57g-96vp Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 9.9 · sandboxie-plusNVD modified 2026-10-14 20:10
Affected (CPE criteria) 1
cpe:2.3:a:sandboxie-plus:sandboxie:*:*:*:*:plus:*:*:*
References 4
- https://github.com/sandboxie-plus/Sandboxie/commit/000492f8c411d24292f1b977a107994347bc7dfa Patch
- https://github.com/sandboxie-plus/Sandboxie/releases/tag/v1.16.7 Release Notes
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-w476-j57g-96vp Exploit, Vendor Advisory
- https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-w476-j57g-96vp Exploit, Vendor Advisory