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CVE-2026-34461

Sandboxie-Plus SbieIniServer RunSbieCtrl stack buffer overflow allows local privilege escalation PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
sandboxie-plus / Sandboxieaffected < 1.17.3

CWE

CWE-121

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.