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Sandboxie (Windows sandbox/isolation software) versions 1.16.6 and below contain a privilege-escalation vulnerability in the SYSTEM-level service SbieSvc.exe. The service exposes the SbieIniServer::RC4Crypt handler to sandboxed processes. In this handler, a fixed header size is added to a caller-controlled value_len without integer overflow checking. Supplying a very large value_len (e.g., 0xFFFFFFF0) causes the computed allocation size to wrap, resulting in an undersized heap allocation. When attacker-controlled data is subsequently copied into this buffer, a heap overflow occurs, enabling arbitrary code execution in the context of the SYSTEM service and thereby escaping the sandbox and fully compromising the host. The issue is fixed in Sandboxie 1.16.7.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Sandboxie sandbox escape / local privilege escalation leading to arbitrary code execution as SYSTEM via a flaw in the SboxSvc.exe service’s handling of client-provided message lengths (missing integer overflow check and unsafe pointer arithmetic).
A critical integer overflow vulnerability in Sandboxie (versions 1.16.6 and below) allows sandboxed processes to escape the sandbox and execute arbitrary code as SYSTEM, leading to full host compromise. The flaw is due to improper validation of a user-controlled length in the SbieIniServer::RC4Crypt handler, resulting in a heap overflow.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.