CVE-2026-102193 in Windows
Summary
by MITRE • 10/13/2026
Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 10/15/2026
The vulnerability identified as a use-after-free condition within the Windows Broadcast DVR User Service represents a critical security flaw that compromises the integrity of the operating system's privilege model. This specific service, responsible for managing digital video recording and broadcasting functionalities on Windows systems, contains memory management errors where pointers to freed memory blocks are not properly nullified or validated before subsequent access attempts. When an attacker triggers this condition through carefully crafted inputs or sequences of operations directed at the service interface, they can manipulate the heap structure in a way that allows for arbitrary code execution within the context of the running process. This type of vulnerability is classically categorized under CWE-416, which defines use-after-free as a situation where software uses memory after it has been freed, leading to unpredictable behavior and potential exploitation.
The operational impact of this flaw is severe due to its ability to facilitate local privilege escalation. Since the Broadcast DVR User Service typically runs with elevated privileges or specific system-level permissions required for hardware interaction and media processing, an attacker who successfully exploits this use-after-free condition can execute code within that high-privilege context. This effectively allows a low-privileged user on the same machine to bypass standard access controls and gain administrative rights over the entire system. Such escalation enables the installation of malware, creation of new administrator accounts, theft of sensitive data, or modification of security settings without detection by standard auditing mechanisms. The attack vector is local, meaning physical access or initial foothold via phishing or other entry points is required to trigger the exploit, but once achieved, the lateral movement and persistence capabilities are significantly enhanced.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK techniques related to privilege escalation on Windows systems. Specifically, it relates to mechanisms where attackers abuse system services or components that operate with higher integrity levels than the initial compromised account. The exploitation path likely involves heap spraying or targeted allocation strategies to control the content of the freed memory block, ensuring that when the dangling pointer is dereferenced, it points to attacker-controlled data structures rather than random garbage values. This precision allows for reliable code execution and potentially full system compromise if not mitigated promptly.
Mitigation strategies must focus on both immediate patching and long-term architectural improvements. Microsoft has released security updates addressing this specific flaw in the Broadcast DVR User Service, which should be applied to all affected Windows versions as a priority action. Administrators are advised to verify that the latest cumulative updates for their respective operating system editions are installed. Beyond patching, reducing the attack surface by disabling unnecessary services can provide additional defense-in-depth. If the digital video recording functionality is not required for business operations, disabling or uninstalling the Broadcast DVR User Service removes the vulnerable component entirely from the environment. Furthermore, implementing strict application control policies and monitoring for unusual process creation events associated with system services can help detect exploitation attempts in real-time. Regular vulnerability scanning and penetration testing should also be conducted to identify similar memory corruption flaws across other Windows components that may pose comparable risks.