Description

Heap-based buffer overflow in Windows Sensor Data Service allows an authorized attacker to elevate privileges locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T17:18:10.163Z",
  "pubdate": "2026-08-11T17:18:10.163Z",
  "executiveSummary": "A heap-based buffer overflow vulnerability has been identified within the Windows Sensor Data Service. This security flaw enables a locally authenticated threat actor to execute arbitrary code and achieve local privilege escalation. The vulnerability resides in how the affected service processes memory allocations when handling sensor data inputs. Successful exploitation allows an attacker with low-level privileges to elevate their execution context to higher privilege levels, potentially leading to a full system compromise. The primary attack vector requires local access to the target host and the ability to interact with the vulnerable Windows Sensor Data Service. The risk implication is severe, as an attacker who has initially breached a standard user account can leverage this vulnerability to bypass security boundaries, install malicious persistence mechanisms, access sensitive system resources, or pivot to other components within the operating system architecture. Given the local requirement, exploitation typically presupposes initial compromise or legitimate interactive access, making multi-layered endpoint protection and timely patching critical for risk mitigation.",
  "technicalDetails": "The vulnerability is a classic heap-based buffer overflow stemming from improper bounds checking within the Windows Sensor Data Service. The root cause lies in the service's failure to adequately validate the size parameters of input data before copying buffers into dynamically allocated heap memory regions. When the service processes maliciously crafted requests or sensor data payloads, an input exceeding the pre-allocated buffer size is written to the heap, resulting in a heap corruption condition.\nThe affected component is the Windows Sensor Data Service, which manages sensor communication and data dispatching within the operating system. Exploitation requires the attacker to have local execution capabilities and authorization to interact with the service interface. While specific version numbers and function names are bound to the underlying Windows binaries, the attack flow generally proceeds as follows: First, the attacker authenticates locally to the system with standard user privileges. Second, the attacker crafts a specialized payload designed to trigger the vulnerable memory copy operation within the service. Third, the attacker transmits this payload via the appropriate inter-process communication mechanism or API exposed by the Windows Sensor Data Service. Fourth, the oversized input overflows the destination heap buffer, overwriting adjacent heap metadata or critical function pointers.\nBy carefully manipulating the heap layout and controlling the overflow data, the attacker can hijack the execution flow of the service. Because the Windows Sensor Data Service executes with elevated system or service privileges, successful redirection of code execution allows the attacker to run arbitrary commands or payloads under the security context of the service account. The post-exploitation impact includes complete local privilege escalation, tampering with system configurations, disabling security controls, and executing unauthorized administrative actions across the affected operating system instance. Network exposure is limited since the vulnerability is exploitable locally, but the integrity and confidentiality of the host are severely compromised once the exploit payload executes successfully."
}