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CVE-2025-64721— Sandboxie's Integer Overflow in SbieIniServer::RC4Crypt allows sandbox escape and SYSTEM compromise

Quick assessment

Affected
sandboxie-plus Sandboxie
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sandboxie是sandboxie-plus开源的一款基于沙盒的隔离软件。 Sandboxie 1.16.6及之前版本存在输入验证错误漏洞，该漏洞源于未检查溢出，可能导致堆溢出和执行任意代码。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.72% · P53
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I. Basic Information for CVE-2025-64721

Vulnerability Information
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Vulnerability Title
Sandboxie's Integer Overflow in SbieIniServer::RC4Crypt allows sandbox escape and SYSTEM compromise
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Sandboxie 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sandboxie是sandboxie-plus开源的一款基于沙盒的隔离软件。 Sandboxie 1.16.6及之前版本存在输入验证错误漏洞，该漏洞源于未检查溢出，可能导致堆溢出和执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sandboxie-plus Sandboxie < 1.16.7 -

II. Public POCs for CVE-2025-64721

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III. Intelligence Information for CVE-2025-64721

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Patches & Fixes for CVE-2025-64721 (1)

Vendor Advisories for CVE-2025-64721 (1)

Other References for CVE-2025-64721 (1)

IV. Related Vulnerabilities

Same product: Sandboxie
Same vendor: sandboxie-plus
Same weakness: CWE-190

V. Comments for CVE-2025-64721

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