EUVD-2026-27461CVSS VectorNVD
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
Lifecycle Timeline
3DescriptionNVD
Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, the SbieIniServer RunSbieCtrl handler contains a stack buffer overflow. The MSGID_SBIE_INI_RUN_SBIE_CTRL message is handled before normal sandbox and impersonation checks, and for non-sandboxed callers, the handler copies the trailing message payload into a fixed-size WCHAR ctrlCmd[128] stack buffer using memcpy without verifying the length fits within the buffer. The service pipe is created with a NULL DACL, allowing any local interactive process to connect and send an oversized payload to overflow the stack. 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.
AnalysisAI
Local privilege escalation to SYSTEM in Sandboxie-Plus 1.17.2 and earlier allows low-privileged interactive users to trigger stack buffer overflow in SbieSvc service via unauthenticated IPC, bypassing sandbox isolation controls. The vulnerability exists in the RunSbieCtrl handler which processes crafted messages before security checks and copies unbounded input into a 128-character stack buffer. …
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RemediationAI
Within 24 hours: Identify all systems running Sandboxie-Plus 1.17.2 or earlier via asset inventory or endpoint detection tools; immediately restrict interactive login access to low-privileged accounts on affected systems if feasible. Within 7 days: Upgrade all affected Sandboxie-Plus installations to version 1.17.3 or later. …
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