Description

Missing authentication for critical function in Windows Remote Desktop Services allows an authorized attacker to elevate privileges locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T17:18:11.377Z",
  "pubdate": "2026-08-11T17:18:11.377Z",
  "executiveSummary": "A privilege escalation vulnerability exists within Windows Remote Desktop Services due to missing authentication enforcement for a critical function. This security flaw allows an authenticated local attacker to elevate their execution context and gain unauthorized privileged access on the affected system.\nThe vulnerability affects Windows Remote Desktop Services, potentially exposing multi-user environments, enterprise servers, and workstation deployments to unauthorized privilege boundaries crossing. The risk implication is significant because a low-privileged local user can leverage this flaw to execute arbitrary actions with elevated permissions, bypassing standard operating system access controls.\nSuccessful exploitation requires the attacker to possess prior local access to the target system and be authorized to interact with the vulnerable service component. No complex remote network vectors are indicated, as the flaw specifically enables local privilege elevation through improper authentication checks within a critical internal function.",
  "technicalDetails": "The root cause of the vulnerability stems from an insufficient or missing authentication check within a critical function handled by Windows Remote Desktop Services. When specific API calls or internal methods within the Remote Desktop Services component are invoked, the application fails to adequately verify whether the calling context possesses the necessary authorization to perform the requested operation.\nExploitation of this vulnerability occurs locally. An attacker with standard user privileges on the target system interacts with the vulnerable component of Windows Remote Desktop Services. Because the critical function lacks proper access validation and authentication enforcement, the service processes the incoming request as if it originated from a trusted, privileged entity.\nThe step-by-step attack flow involves: first, the local attacker establishes a session or executes code under a low-privileged user context; second, the attacker targets the vulnerable critical function exposed by Windows Remote Desktop Services; third, by invoking this function without triggering authentication barriers, the attacker supplies manipulated parameters or instructions to the service; fourth, the service executes the requested operation with its own elevated system privileges; and fifth, the attacker successfully achieves local privilege escalation, gaining administrative or system-level control over the affected resource.\nThe affected component is localized within the architecture of Windows Remote Desktop Services, specifically managing internal administrative or functional routines that mishandle local client requests. The privilege requirement for the initial phase is an authorized local user, while the post-exploitation impact results in full privilege escalation, enabling the execution of arbitrary administrative tasks, persistence establishment, and compromise of system-wide confidentiality, integrity, and availability."
}