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": "2026-08-11T17:18:13.043Z",
  "pubdate": "2026-08-11T17:18:13.043Z",
  "executiveSummary": "A privilege escalation vulnerability exists within Windows Remote Desktop Services due to missing authentication enforcement for critical functions. This security flaw allows an authenticated local attacker to execute arbitrary operations or interact with privileged routines improperly exposed by the affected component.\nThe primary impact of this vulnerability is local privilege escalation, enabling an attacker to compromise the integrity and confidentiality of the targeted operating system by acquiring elevated execution rights. Affected systems are limited to Microsoft Windows environments running vulnerable iterations of Remote Desktop Services.\nThe risk implication is severe for multi-user systems or environments where untrusted local users have interactive or programmatic access. The attacker must possess local access to the target host and be authorized to interact with the system, but lacks initial high-privilege credentials.\nSuccessful exploitation hinges on the ability of the attacker to target the inadequately authenticated critical function directly, bypassing standard access control checks implemented within the service architecture. No specific remote network exposure is inherently required, as the attack vector is characterized as local.",
  "technicalDetails": "The root cause of the vulnerability stems from insufficient authentication checks within critical functions exposed by Windows Remote Desktop Services. When specific internal methods or interfaces are invoked, the component fails to properly validate whether the calling context possesses the necessary security permissions or authenticated session state.\nThe vulnerable component resides within the core architecture of Windows Remote Desktop Services, specifically handling inter-process communication, local procedure calls, or internal API routines responsible for managing desktop sessions and administrative tasks.\nThe attack vector is strictly local, requiring the threat actor to have prior interactive logon capabilities or the ability to execute code locally on the target operating system. The attacker does not require elevated privileges initially, relying solely on the missing authentication enforcement to bridge the security boundary.\nThe step-by-step attack flow proceeds as follows: First, the local attacker establishes a execution context on the target host using standard, non-privileged user credentials. Second, the attacker identifies or interacts with the unauthenticated critical function exposed by Windows Remote Desktop Services. Third, by invoking this function directly through programmatic interfaces, the attacker bypasses authorization gates that would normally restrict access. Finally, the service executes the requested critical operation on behalf of the attacker, granting elevated privileges within the local system architecture.\nThe payload behavior involves leveraging the overly permissive function to spawn processes, modify system-level resources, or manipulate kernel or user-mode structures associated with Remote Desktop Services. The post-exploitation impact includes full local system compromise, installation of persistent backdoors, data exfiltration, and lateral movement capabilities originating from the newly acquired high-integrity context."
}