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CVE-2025-64721

CRITICAL

10.0

Description

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.

CVE Details

CVSS v3.1 Score10.0

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published12/11/2025

Last Modified12/22/2025

Sourcenvd

Honeypot Sightings0

Affected Products

sandboxie-plus:sandboxie

Weaknesses (CWE)

CWE-190

References

https://github.com/sandboxie-plus/Sandboxie/commit/000492f8c411d24292f1b977a107994347bc7dfa(security-advisories@github.com)

https://github.com/sandboxie-plus/Sandboxie/releases/tag/v1.16.7(security-advisories@github.com)

https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-w476-j57g-96vp(security-advisories@github.com)

https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-w476-j57g-96vp(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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