CVE-2022-24495: Windows 10 Direct Show RCE Vulnerability

CVE-2022-24495 Overview

CVE-2022-24495 is a remote code execution vulnerability in the Microsoft Windows Direct Show multimedia framework. The flaw affects multiple supported versions of Windows desktop and Windows Server. An attacker who successfully exploits this vulnerability can execute arbitrary code in the context of the affected process. The CVE was published to the National Vulnerability Database on April 15, 2022 and most recently updated on January 2, 2025. Microsoft addressed the issue through its Patch Tuesday security update cycle.

Critical Impact

Successful exploitation allows network-based remote code execution against Windows endpoints and servers running vulnerable Direct Show components, with high impact to confidentiality, integrity, and availability.

Affected Products

• Microsoft Windows 10 (versions 1607, 1809, 1909, 20H2, 21H1, 21H2)
• Microsoft Windows 11 (x64 and ARM64)
• Microsoft Windows Server 2016, Windows Server 2019, and Windows Server 2022

Discovery Timeline

• 2022-04-15 - CVE-2022-24495 published to NVD
• 2025-01-02 - Last updated in NVD database

Technical Details for CVE-2022-24495

Vulnerability Analysis

The vulnerability resides in Microsoft Direct Show, a legacy multimedia framework used by Windows applications to render and process audio and video streams. Direct Show parses a wide range of container and codec formats, exposing complex parsing logic to untrusted input. CVE-2022-24495 enables remote code execution when a vulnerable component processes crafted media data.

The attack vector is network-based and requires low-level privileges on the target. Attack complexity is rated high, indicating that exploitation depends on specific runtime conditions or attacker-controlled preconditions rather than a single deterministic trigger. No user interaction is required once those conditions are met. Successful exploitation impacts confidentiality, integrity, and availability at the affected process scope.

The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog, and no public proof-of-concept exploit is currently catalogued. Microsoft has not assigned a specific CWE classification beyond NVD-CWE-noinfo.

Root Cause

Microsoft has not published detailed root cause information. Direct Show RCE flaws of this class typically arise from unsafe parsing of media streams, including out-of-bounds memory access, type confusion, or heap corruption during demultiplexing of crafted media containers. Refer to the Microsoft Security Update Guide for vendor-supplied detail.

Attack Vector

An attacker delivers crafted media content to a host running a vulnerable Direct Show component. Delivery paths include media files accessed over a network share, content streamed by an application using Direct Show APIs, or media data processed by a service exposed to attacker-controlled input. When the framework parses the malicious stream, the flaw can be triggered to execute attacker-controlled code in the context of the consuming process.

Since attack complexity is high, attackers typically chain this primitive with reconnaissance or auxiliary techniques to satisfy the required runtime conditions before achieving reliable code execution.

Detection Methods for CVE-2022-24495

Indicators of Compromise

• Unexpected child processes spawned from applications that link quartz.dll or other Direct Show components.
• Crashes or anomalous exceptions in processes loading Direct Show filters, particularly when handling media supplied from network locations.
• Outbound network connections initiated by media-handling processes immediately after parsing untrusted content.

Detection Strategies

• Monitor process creation events where the parent is a media or document-handling application and the child is a shell, scripting host, or LOLBin.
• Hunt for module loads of quartz.dll, qedit.dll, or third-party Direct Show filters by processes that do not normally consume media.
• Correlate Windows Error Reporting telemetry with media-parsing crashes across endpoints to surface exploitation attempts at scale.

Monitoring Recommendations

• Ensure endpoint telemetry captures process, module load, and network events from media-handling workloads and ingest those events into a centralized analytics platform.
• Validate that affected hosts report the April 2022 cumulative update KB identifiers and subsequent rollups in vulnerability management tooling.
• Alert on inbound SMB or HTTP delivery of media file types to user workstations from untrusted networks.

How to Mitigate CVE-2022-24495

Immediate Actions Required

• Apply the Microsoft security update for CVE-2022-24495 to all affected Windows 10, Windows 11, and Windows Server hosts.
• Inventory systems where Direct Show is consumed by line-of-business applications and prioritize patching those endpoints first.
• Restrict ingestion of untrusted media files at network and email gateways until patching is complete.

Patch Information

Microsoft released a security update addressing CVE-2022-24495 as part of its April 2022 Patch Tuesday cycle. Patch availability and KB article references for each affected Windows build are documented in the Microsoft Security Update Guide. Administrators should validate deployment through Windows Update for Business, WSUS, or their preferred patch management platform.

Workarounds

• Block delivery of high-risk media container formats at email and web proxies where business need does not require them.
• Apply attack surface reduction rules in Microsoft Defender to limit child process creation from Office and media-handling applications.
• Run media-handling applications under standard user accounts and restrict access to network shares hosting untrusted content.

# Verify presence of the April 2022 cumulative update on a Windows host
wmic qfe list brief /format:table | findstr /I "KB501"