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CVE-2025-64721

CRITICAL Exploitation: PoC
9.9
CVSS 4.0
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.

Metadata

CVE ID
CVE-2025-64721
State
PUBLISHED
Assigner
GitHub_M
Reserved
2025-11-10 14:07 UTC
Published
2025-12-11 21:15 UTC
Last updated
2025-12-15 15:46 UTC
Primary CWE
CWE-190
CWE-190: Integer Overflow or Wraparound
Vendor / Product
sandboxie-plus / Sandboxie
Sources
cve.org  ·  NVD

Severity & Metrics

9.9 CRITICAL CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
sandboxie-plus Sandboxie — < 1.16.7
Weakness (CWE)
CWESourceDescription
CWE-190 cna CWE-190: Integer Overflow or Wraparound
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.9 CRITICAL 4.0 cna 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
References (3)
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