Description

Use after free in Windows Modern Device Management (MDM) allows an authorized attacker to elevate privileges locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T17:18:20.483Z",
  "pubdate": "2026-08-11T17:18:20.483Z",
  "executiveSummary": "A use-after-free vulnerability exists within the Windows Modern Device Management (MDM) component, enabling an authorized local attacker to achieve privilege escalation.\nThe vulnerability arises from improper memory management within the affected subsystem, where dynamically allocated memory is referenced after it has been deallocated, leading to potential memory corruption.\nSuccessful exploitation of this flaw allows a malicious actor with local execution capabilities and prior authorization to execute arbitrary code in the context of a higher privileged security context, circumventing standard operating system access controls.\nThe impact includes complete compromise of the affected local system integrity and confidentiality, as the elevated privileges acquired through the exploit can be leveraged to install malicious software, manipulate system configurations, or access sensitive data.\nPrerequisites for exploitation include local access to the target system and valid authorization credentials required to interact with the vulnerable Windows Modern Device Management interfaces.\nGiven the local attack vector and the necessity of prior authorization, the overall risk is categorized as significant for enterprise environments utilizing Windows MDM configurations where local users possess limited interaction rights.",
  "technicalDetails": "The vulnerability is classified as a use-after-free memory corruption flaw residing within the Windows Modern Device Management (MDM) subsystem.\nThe root cause stems from a failure in the application logic to properly nullify or manage pointers referencing heap-allocated memory objects after those objects have been freed during specific state transitions or error-handling routines.\nWhen the vulnerable component processes specially crafted requests or interaction sequences submitted by an authorized local user, it attempts to access the previously released memory region.\nThis dangling pointer dereference can be manipulated by an attacker who performs heap grooming or exploitation techniques to re-allocate the freed memory block with controlled payload data, thereby hijacking the execution flow.\nThe attack flow proceeds as follows: First, the authorized attacker establishes interaction with the Windows Modern Device Management service or local API endpoints. Second, the attacker triggers a specific sequence of operations designed to allocate, free, and subsequently reference the vulnerable memory object. Third, through precise timing and heap manipulation, the attacker replaces the freed memory contents with shellcode or ROP chains. Finally, when the application dereferences the dangling pointer, it executes the attacker-controlled instructions under the security context of the privileged service.\nThe vulnerable component is part of the core Windows Modern Device Management architecture, operating with elevated privileges necessary to manage system policies and configurations.\nNetwork exposure is strictly local, as the attack vector requires local execution and interaction with the affected management interfaces.\nAuthentication and privilege requirements dictate that the attacker must already possess local access and the necessary authorization to interface with the Windows Modern Device Management service before initiating the exploitation sequence.\nThe post-exploitation impact includes local privilege escalation, allowing the attacker to bypass security boundaries, execute administrative commands, and persist within the compromised environment."
}