CVE-2026-69613: Windows Image Acquisition Use After Free

CVE-2026-69613 Overview

CVE-2026-69613 is a use-after-free vulnerability [CWE-416] in the Windows Image Acquisition (WIA) component. An authorized local attacker can exploit the flaw to elevate privileges on an affected Windows system. Microsoft published the advisory through its Security Update Guide, and the CVE targets local scenarios rather than remote network access.

Successful exploitation yields high impact to confidentiality, integrity, and availability, granting the attacker elevated code execution in the context of the WIA service. The attack complexity is high, which reflects the timing and memory-state conditions required to trigger the freed-object reuse reliably.

Critical Impact
A local, authenticated attacker who wins the required race window can execute code with elevated privileges through reuse of freed memory in Windows Image Acquisition.

Affected Products

Microsoft Windows (Windows Image Acquisition component)
Refer to the Microsoft Security Update Guide for the authoritative list of affected builds
Systems where the WIA service (stisvc) is enabled

Discovery Timeline

2026-09-08 - CVE-2026-69613 published to NVD
2026-09-09 - Last updated in NVD database

Technical Details for CVE-2026-69613

Vulnerability Analysis

Windows Image Acquisition provides the imaging framework used by scanners and cameras through the stisvc service and associated COM interfaces. The vulnerability is a use-after-free condition in which a WIA object is released while a reference to it remains reachable. A subsequent operation dereferences the stale pointer, allowing the attacker to influence execution flow through controlled memory reuse.

Exploitation requires local access with low privileges and no user interaction. The high attack complexity reflects the race and heap-grooming conditions an attacker must satisfy to reallocate the freed slot with attacker-controlled data before it is reused. When conditions align, the attacker gains code execution at the privilege level of the WIA service, which typically runs with elevated rights.

The scope is unchanged, meaning the vulnerable component and the impacted component share the same security authority. The confidentiality, integrity, and availability impacts are all high because privilege elevation grants broad control over the local system.

Root Cause

The root cause is improper object lifetime management within Windows Image Acquisition. A reference to a WIA object persists after the underlying memory is freed. When the code path later accesses that reference, the freed allocation may already be replaced by attacker-controlled data, producing a classic use-after-free primitive tracked as [CWE-416].

Attack Vector

The attack vector is local. An attacker with an authenticated session invokes WIA functionality, triggers the free of the target object, and races to reallocate the memory before the vulnerable code path reuses it. See the Microsoft Security Update Guide for component-specific technical details. No verified public proof-of-concept exploit is available at the time of publication.

Detection Methods for CVE-2026-69613

Indicators of Compromise

Unexpected crashes or restarts of the Windows Image Acquisition service (stisvc) recorded in the System event log
New or unusual child processes spawned by svchost.exe hosting stisvc, particularly command shells or script interpreters
Local privilege elevation events where a standard user account subsequently performs actions requiring administrative rights

Detection Strategies

Monitor process creation events (Windows Event ID 4688 or Sysmon Event ID 1) for anomalous children of the stisvc service host
Alert on WIA service faults and access violations that could indicate exploitation attempts against the vulnerable code path
Correlate local logon events with subsequent privileged operations to surface unexplained privilege changes

Monitoring Recommendations

Ingest endpoint process, service, and crash telemetry into a central analytics platform for cross-host correlation
Baseline normal behavior of the WIA service on workstations that legitimately use imaging devices, and treat deviations as high priority
Review privileged token usage and integrity level changes on hosts where standard users have interactive access

How to Mitigate CVE-2026-69613

Immediate Actions Required

Apply the Microsoft security update referenced in the Microsoft Security Update Guide as soon as it is available for your Windows build
Prioritize patching multi-user systems and workstations where standard users have interactive logon rights
Audit which hosts require Windows Image Acquisition and disable the service on systems that do not need imaging device support

Patch Information

Microsoft addresses CVE-2026-69613 through updates distributed via the Security Update Guide. Consult the advisory for the specific KB articles, affected builds, and cumulative updates that remediate the WIA use-after-free. Deploy the patch through your standard Windows update mechanism, including Windows Update, WSUS, Microsoft Intune, or Configuration Manager.

Workarounds

Disable the Windows Image Acquisition service (stisvc) on systems that do not use scanners or cameras, using sc.exe config stisvc start= disabled followed by sc.exe stop stisvc
Restrict interactive local logon rights so untrusted users cannot reach the vulnerable local attack surface
Enforce application control policies that limit which binaries standard users can execute to raise the bar for exploitation

bash

# Configuration example: disable the Windows Image Acquisition service where unused
sc.exe stop stisvc
sc.exe config stisvc start= disabled