CVE-2025-24058 Overview
CVE-2025-24058 is an elevation of privilege vulnerability in the Windows Desktop Window Manager (DWM) Core Library. The flaw stems from improper input validation [CWE-20] in a component that runs with elevated privileges on the local system. An authenticated local attacker can exploit the weakness to elevate privileges from a standard user context to a higher privilege level.
Microsoft addressed the issue in the April 2025 Patch Tuesday cycle. The vulnerability affects a broad range of Windows client and server releases, including Windows 10, Windows 11 (through 24H2), and Windows Server editions from 2019 through 2025.
Critical Impact
A local attacker with valid credentials can gain SYSTEM-level privileges, enabling full compromise of confidentiality, integrity, and availability on the affected host.
Affected Products
- Microsoft Windows 10 (1809, 21H2, 22H2)
- Microsoft Windows 11 (22H2, 23H2, 24H2)
- Microsoft Windows Server 2019, 2022, 2022 23H2, and 2025
Discovery Timeline
- 2025-04-08 - CVE-2025-24058 published to the National Vulnerability Database
- 2025-04-08 - Microsoft published Security Update Guide advisory for CVE-2025-24058
- 2026-06-17 - Last updated in the NVD database
Technical Details for CVE-2025-24058
Vulnerability Analysis
The Desktop Window Manager (DWM) is a Windows compositing manager responsible for rendering the graphical user interface. The DWM Core Library (dwmcore.dll) executes with elevated privileges to manage window composition, rendering, and inter-process graphical operations.
CVE-2025-24058 is an improper input validation flaw within this library. When the library processes crafted input from a local, authenticated user, it fails to validate the data correctly before acting on it. That failure enables an attacker-controlled code path to influence execution in a privileged context.
Because exploitation requires local access and valid credentials, this class of flaw is commonly chained with initial-access techniques such as phishing or credential theft. Once chained, the attacker moves from user-mode privileges to a higher integrity level on the host.
Root Cause
The root cause is missing or insufficient input validation [CWE-20] on data structures handled by the DWM Core Library. Privileged components must treat inputs from lower-privileged callers as untrusted. When validation is incomplete, an attacker can supply malformed input that drives the privileged process into an unsafe state, resulting in privilege elevation.
Attack Vector
Exploitation requires local access with low privileges and no user interaction. An attacker running code as a standard user submits crafted input to the DWM Core Library through its normal interfaces. Successful exploitation yields elevated privileges on the same host, typically enabling code execution at SYSTEM.
No public proof-of-concept exploit or exploitation in the wild has been reported. Microsoft has not listed the issue on the CISA Known Exploited Vulnerabilities catalog. Refer to the Microsoft Security Update Guide for CVE-2025-24058 for authoritative technical detail.
Detection Methods for CVE-2025-24058
Indicators of Compromise
- Unexpected child processes spawned by dwm.exe or processes interacting with the DWM Core Library.
- New SYSTEM-level processes launched shortly after a standard user logon or a suspicious user-mode binary execution.
- Presence of unsigned or unusual binaries in user-writable directories that make API calls into graphics or DWM subsystems.
Detection Strategies
- Monitor for privilege transitions where a standard-user process is followed by SYSTEM-level activity on the same session.
- Alert on abnormal token manipulation or integrity-level changes tied to graphics-subsystem components.
- Correlate endpoint telemetry with Windows patch state to prioritize hosts still exposed to CVE-2025-24058.
Monitoring Recommendations
- Ingest Windows Security, Sysmon, and EDR process-lineage events into a centralized analytics platform for cross-host correlation.
- Track patch-compliance status against the April 2025 Microsoft security updates across all Windows 10, 11, and Server systems.
- Baseline normal dwm.exe behavior and alert on deviations such as unexpected module loads or interactive child processes.
How to Mitigate CVE-2025-24058
Immediate Actions Required
- Apply the April 2025 Microsoft security updates that address CVE-2025-24058 across all affected Windows client and server builds.
- Prioritize patch deployment on multi-user systems such as Remote Desktop Session Hosts, VDI hosts, and shared workstations.
- Restrict local logon rights and enforce least privilege to reduce the population of accounts that can attempt local exploitation.
- Rotate credentials on any host suspected of prior compromise before or during patch deployment.
Patch Information
Microsoft released fixes for CVE-2025-24058 through the April 2025 cumulative security updates for Windows 10, Windows 11, and Windows Server. Consult the Microsoft Security Update Guide for CVE-2025-24058 for the specific knowledge base article and build numbers for each supported release.
Workarounds
- No vendor-supplied workaround is documented. Patching is the required remediation.
- Reduce exposure by enforcing application allow-listing to block untrusted binaries from executing in user context.
- Limit interactive logon on servers and enforce administrative-tier separation to minimize opportunities for local privilege escalation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
