Description

Use after free in Windows Deployment Services allows an unauthorized attacker to execute code over a network.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-08-11T17:18:43.440Z",
  "pubdate": "2026-08-11T17:18:43.440Z",
  "executiveSummary": "A use-after-free vulnerability exists within Windows Deployment Services, presenting significant security risks to enterprise network infrastructures.\nThe vulnerability class is classified as a use-after-free memory corruption flaw, which arises from improper management of dynamic memory allocations during network transaction processing.\nSuccessful exploitation of this flaw allows an unauthorized, remote attacker to execute arbitrary code within the context of the vulnerable service.\nThe affected product is Windows Deployment Services across supported architectures, exposing network-connected systems to potential compromise.\nThe risk implications are severe, as unauthorized remote code execution can lead to complete system takeover, lateral movement within the enterprise network, and deployment of secondary payloads.\nAttacker capabilities include unauthenticated remote exploitation over the network without requiring prior system access or user interaction, assuming network reachability to the deployment service.\nExploitation requirements are limited to network connectivity to the target service and the ability to send malformed or specially crafted requests that trigger the memory management error.\nOrganizations utilizing Windows Deployment Services must prioritize remediation to mitigate the threat of unauthorized remote exploitation and potential infrastructure degradation.",
  "technicalDetails": "The vulnerability is fundamentally rooted in a use-after-free memory management defect within Windows Deployment Services.\nThe vulnerable component is responsible for handling specific network protocol communications and parsing incoming requests related to OS deployment operations.\nA use-after-free condition occurs when the application frees a memory object but retains a dangling pointer to that memory address.\nSubsequent operations attempt to reference the dangling pointer, allowing an attacker to manipulate the newly reallocated memory heap.\nThe attack flow begins when an unauthorized attacker sends a specially crafted sequence of network packets to the Windows Deployment Services endpoint.\nUpon receiving the malicious payload, the service improperly handles object lifecycles, leading to the premature release of a heap-allocated resource while maintaining active references to it.\nThe attacker carefully grooms the heap prior to triggering the dangling pointer reference, ensuring that the freed memory block is reallocated with attacker-controlled data or malicious function pointers.\nWhen the application subsequently dereferences the dangling pointer, execution flow is redirected to the attacker-supplied payload.\nAuthentication requirements are absent, as the vulnerability can be triggered by an unauthorized entity communicating directly over the network.\nPrivilege requirements are nonexistent for the initial network-based attack vector, allowing unprivileged remote actors to trigger the condition.\nNetwork exposure is inherent to the service, which listens on designated ports for deployment requests across the network interface.\nThe payload behavior involves arbitrary code execution with the high privileges typically associated with Windows Deployment Services, enabling the execution of shellcode, system commands, or administrative scripts.\nPost-exploitation impact includes full system compromise, installation of persistent backdoors, credential dumping, and pivoting to adjacent systems within the network domain."
}