CVE-2025-47986: Windows 10 1507 Use After Free Vulnerability

CVE-2025-47986 Overview

CVE-2025-47986 is a use-after-free vulnerability [CWE-416] in the Microsoft Universal Print Management Service. An authorized local attacker can exploit the flaw to elevate privileges on affected Windows systems. The vulnerability affects a broad set of Microsoft Windows client and server releases, including Windows 10, Windows 11, and Windows Server versions from 2008 through 2025. Successful exploitation results in high impact to confidentiality, integrity, and availability, and can cross security scope boundaries.

Critical Impact
A local attacker with low privileges can trigger memory reuse in the Universal Print Management Service to execute code in a higher-privileged context, enabling full compromise of the affected host.

Affected Products

Microsoft Windows 10 (1507, 1607, 1809, 21H2, 22H2)
Microsoft Windows 11 (22H2, 23H2, 24H2)
Microsoft Windows Server 2008, 2012, 2016, 2019, 2022, 2022 23H2, and 2025

Discovery Timeline

2025-07-08 - CVE-2025-47986 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-47986

Vulnerability Analysis

The vulnerability resides in the Universal Print Management Service, a Windows component responsible for handling print job orchestration and printer management. The flaw is a use-after-free condition, in which the service continues to reference memory after it has been released. An attacker with valid local access and low privileges can trigger the freed allocation and reclaim the memory region with attacker-controlled data. When the service subsequently dereferences the stale pointer, execution flow can be redirected to attacker-controlled logic running in the service's security context.

Because exploitation crosses a security scope boundary, code executed via the service inherits elevated permissions beyond those of the calling user. This enables privilege escalation from a standard user account to SYSTEM-level control of the host.

Root Cause

The root cause is improper memory lifetime management within the Universal Print Management Service [CWE-416]. Object references are retained beyond the lifetime of the underlying allocation, creating a window in which freed memory can be reallocated and controlled by an attacker before the dangling pointer is used.

Attack Vector

Exploitation requires local access to the target system and an authenticated user context. No user interaction is required beyond the attacker's own actions. The attacker interacts with the Universal Print Management Service to trigger the vulnerable code path, races to reclaim freed memory with crafted data, and forces the service to operate on the corrupted object. This yields code execution in the higher-privileged service context.

No public proof-of-concept exploit or in-the-wild exploitation has been reported by CISA at the time of publication.

Detection Methods for CVE-2025-47986

Indicators of Compromise

Unexpected crashes, restarts, or Windows Error Reporting events for the Universal Print Management Service (PrintWorkflowUserSvc, PrintNotify, related print stack processes)
Newly created privileged accounts, services, or scheduled tasks shortly after anomalous print service activity
Child processes spawned from print service processes that are not part of normal print job handling

Detection Strategies

Monitor process lineage for suspicious child processes of Windows print service binaries running as SYSTEM
Correlate service crashes in the print stack with subsequent process creation or token manipulation events
Deploy behavioral endpoint detection to identify local privilege escalation patterns, including unexpected token duplication and impersonation events following print service activity

Monitoring Recommendations

Enable Windows Security event logging for process creation (Event ID 4688) with command-line auditing
Forward Application and System event logs to a central SIEM and alert on repeated print service faults from the same user context
Track installation of new services or drivers on endpoints that host the Universal Print Management Service

How to Mitigate CVE-2025-47986

Immediate Actions Required

Apply the Microsoft security update referenced in the Microsoft CVE-2025-47986 Advisory to all affected Windows client and server systems
Prioritize patching on multi-user systems, terminal servers, and any host where untrusted users can obtain interactive or authenticated local sessions
Audit local user accounts and remove unnecessary interactive logon rights to reduce the pool of potential attackers

Patch Information

Microsoft has released updates addressing CVE-2025-47986 across all supported affected products. Refer to the Microsoft Security Response Center advisory for the specific KB article and update package that corresponds to each Windows build.

Workarounds

Where universal print functionality is not required, disable the Universal Print Management Service and related print services on affected hosts
Restrict interactive and remote logon rights via Group Policy to limit which local users can reach the vulnerable service
Apply application allowlisting to prevent unauthorized binaries from executing in user contexts that can reach the print service

bash

# Configuration example: disable the print service where not required (PowerShell, run as Administrator)
Stop-Service -Name Spooler -Force
Set-Service -Name Spooler -StartupType Disabled

# Verify status
Get-Service -Name Spooler | Format-List Name, Status, StartType