CVE-2025-27730 Overview
CVE-2025-27730 is a use-after-free vulnerability in the Windows Digital Media component. An authorized local attacker can exploit the flaw to elevate privileges on the affected system. Microsoft published the advisory on April 8, 2025, and the issue affects supported releases of Windows 10, Windows 11, and Windows Server. Successful exploitation grants the attacker high impact to confidentiality, integrity, and availability on the target host. The weakness is classified under CWE-415 and requires low privileges with no user interaction.
Critical Impact
A local, authenticated attacker who triggers the use-after-free condition in Windows Digital Media can execute code with elevated privileges and take full control of the affected Windows host.
Affected Products
- Microsoft Windows 10 (1809, 21H2, 22H2)
- Microsoft Windows 11 (22H2, 23H2, 24H2)
- Microsoft Windows Server 2019, Server 2022 23H2, and Server 2025
Discovery Timeline
- 2025-04-08 - CVE-2025-27730 published to NVD
- 2025-04-08 - Microsoft releases security update addressing CVE-2025-27730
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-27730
Vulnerability Analysis
The vulnerability exists in the Windows Digital Media subsystem, which handles multimedia content and device interactions on Windows platforms. The flaw is a use-after-free condition, tracked under CWE-415, where the component references memory after it has been released. An attacker with local access and low-level privileges can trigger the free-then-reuse sequence to corrupt kernel or driver memory. Successful exploitation allows the attacker to run arbitrary code in an elevated security context. This provides a path from a standard user account to SYSTEM-level privileges on the compromised host.
Root Cause
The root cause is improper management of an object lifetime inside the Windows Digital Media component. The code retains a pointer to a memory region after the underlying object has been released. When the dangling pointer is dereferenced, the attacker can influence the contents of the reused allocation. Microsoft has not published detailed internal analysis of the affected function.
Attack Vector
The attack requires local access and an authenticated session on the target Windows host. The attacker executes crafted code that interacts with the vulnerable Digital Media interface to trigger the free-then-reuse condition. No user interaction is required beyond the attacker's own actions. See the Microsoft Security Update Guide for vendor-supplied technical details.
No verified public proof-of-concept code is available for this vulnerability. Refer to the vendor advisory for authoritative technical information.
Detection Methods for CVE-2025-27730
Indicators of Compromise
- Unexpected process crashes or bug checks referencing Windows Digital Media modules on affected hosts.
- Standard user processes spawning child processes running as SYSTEM without a legitimate elevation path.
- Anomalous access to Digital Media APIs by processes that do not normally handle multimedia content.
Detection Strategies
- Monitor Windows Error Reporting and kernel crash dumps for faults inside Digital Media components.
- Alert on token manipulation and integrity-level changes originating from low-privilege user sessions.
- Correlate local logon events with subsequent privilege escalation indicators such as new SYSTEM-level services or scheduled tasks.
Monitoring Recommendations
- Enable process creation auditing (Event ID 4688) with command-line logging across all Windows endpoints and servers.
- Forward Sysmon and security event telemetry to a central analytics platform to detect exploitation patterns.
- Track patch compliance status for Windows Digital Media updates across the fleet on a continuous basis.
How to Mitigate CVE-2025-27730
Immediate Actions Required
- Apply the April 2025 Microsoft security updates that address CVE-2025-27730 on all affected Windows 10, Windows 11, and Windows Server systems.
- Prioritize patching for multi-user systems, terminal servers, and workstations where untrusted users hold local accounts.
- Audit local accounts and remove unnecessary interactive logon rights to reduce the attackable population.
Patch Information
Microsoft released fixes on April 8, 2025 through the standard Patch Tuesday cycle. Consult the Microsoft Security Update Guide for CVE-2025-27730 for the specific KB article and build numbers that apply to each Windows version in your environment.
Workarounds
- No official workaround has been published by Microsoft; patching is the required remediation.
- Restrict local logon rights and remove unnecessary standard user accounts on sensitive systems until patches are deployed.
- Enforce application allowlisting to block execution of untrusted binaries that could invoke the vulnerable Digital Media code path.
# Verify installed updates on a Windows host
wmic qfe list brief /format:table
# PowerShell equivalent to check hotfix installation
Get-HotFix | Sort-Object -Property InstalledOn -Descending
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
