CVE-2025-60707 in Windows
Summary
by MITRE • 11/11/2025
Use after free in Multimedia Class Scheduler Service (MMCSS) allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 01/05/2026
The vulnerability identified as CVE-2025-60707 represents a critical use-after-free flaw within the Multimedia Class Scheduler Service component of Microsoft Windows operating systems. This service manages multimedia scheduling and resource allocation for applications requiring high-performance audio and video processing capabilities. The flaw exists in how the MMCS service handles memory management during specific multimedia operations, creating a scenario where freed memory locations can be accessed and potentially manipulated by malicious code. The vulnerability specifically affects the service's handling of objects within its memory space, where improper deallocation followed by subsequent access creates opportunities for exploitation. This issue is particularly concerning as it resides within a core system service that operates with elevated privileges, making it an attractive target for privilege escalation attacks.
The technical implementation of this use-after-free vulnerability stems from improper memory management practices within the MMCS service's object lifecycle handling. When multimedia applications interact with the scheduler service, specific objects are allocated in memory and subsequently freed upon completion of operations. However, the service fails to properly invalidate references to these freed objects, allowing attackers to manipulate the memory layout or inject malicious data into previously freed memory regions. The flaw typically manifests when multiple threads or processes interact with the scheduler service simultaneously, creating race conditions that can be exploited to trigger the use-after-free condition. This vulnerability is classified under CWE-416 as a "Use After Free" condition, which represents a well-known class of memory safety issues that have historically led to privilege escalation and system compromise.
The operational impact of this vulnerability extends beyond simple local privilege escalation, as it provides attackers with a pathway to gain elevated system privileges that can be leveraged for further compromise. An authorized attacker with low-privilege access to a system can exploit this vulnerability to execute code with SYSTEM-level privileges, effectively bypassing standard user account restrictions. The attack vector requires local access to the target system, as the vulnerability exists within a service that runs locally and is accessible to authenticated users. However, the implications are severe since once exploited, the attacker can manipulate system resources, access sensitive data, install malicious software, or establish persistent access through the elevated privileges gained. This makes the vulnerability particularly dangerous in environments where local access is possible or where attackers can leverage other initial access vectors to reach the target system.
Mitigation strategies for CVE-2025-60707 should prioritize immediate patch deployment from Microsoft as the primary defense mechanism, since the vulnerability is a known issue with available fixes. System administrators should implement the latest security updates and patches to address the memory management flaw within MMCS service components. Additionally, organizations should consider implementing additional security controls such as restricting local access to systems where possible, monitoring for unusual activity patterns in the multimedia scheduler service, and employing application whitelisting to prevent unauthorized execution of potentially malicious code. The vulnerability aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and may also relate to T1543.003 for "Create or Modify System Process" as attackers might attempt to modify service behavior to maintain persistence. Network segmentation and principle of least privilege should be enforced to limit the potential impact of successful exploitation, while regular security assessments can help identify systems that may be vulnerable to similar memory corruption issues.