CVE-2025-59202 in Windows
Summary
by MITRE • 10/14/2025
Use after free in Windows Remote Desktop Services allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 10/17/2025
The vulnerability identified as CVE-2025-59202 represents a critical use-after-free flaw within Windows Remote Desktop Services that enables authenticated attackers to achieve local privilege escalation. This vulnerability exists in the remote desktop protocol implementation and specifically affects the handling of memory management during certain remote desktop session operations. The flaw manifests when the system attempts to free memory resources that are subsequently accessed, creating a scenario where malicious code can exploit the dangling pointer to execute arbitrary code with elevated privileges.
From a technical perspective, the use-after-free condition occurs when Windows Remote Desktop Services allocates memory for session management structures and then releases that memory without properly invalidating references. When the application later attempts to access this freed memory location, it may contain data from previous operations or even maliciously crafted content that can be manipulated by an attacker. The vulnerability specifically impacts the local security context where an authenticated user can leverage this flaw to gain SYSTEM level privileges on the target system. This represents a significant escalation from standard user privileges to administrative control over the affected Windows system.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with persistent access to critical system resources. Once elevated, an attacker can manipulate system configurations, access sensitive data, establish backdoors, and potentially move laterally within a network environment. The vulnerability is particularly concerning because it requires only local authentication, meaning that an attacker who has already established a legitimate user session can exploit this flaw without requiring additional network access or complex attack vectors. This makes the vulnerability especially dangerous in environments where multiple users maintain active sessions on the same system or where session management is not properly secured.
Security professionals should consider this vulnerability in the context of the CWE-416 weakness classification which specifically addresses use-after-free errors in memory management. The attack pattern aligns with techniques described in the ATT&CK framework under privilege escalation tactics, particularly focusing on local privilege escalation methods that exploit software vulnerabilities. Organizations should prioritize immediate patching of affected systems and implement additional security controls such as monitoring for unusual privilege escalation activities, restricting local authentication where possible, and ensuring proper access controls for remote desktop services. Network segmentation and least-privilege principles should be enforced to limit the potential impact of successful exploitation attempts. The vulnerability also highlights the importance of regular security assessments and vulnerability management programs that can identify and remediate such flaws before they can be exploited in real-world scenarios.