CVE-2025-50155 in Windows
Summary
by MITRE • 08/12/2025
Access of resource using incompatible type ('type confusion') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 11/22/2025
The vulnerability identified as CVE-2025-50155 represents a critical type confusion flaw within the Windows Push Notifications component that enables local privilege escalation for authenticated attackers. This issue resides in the kernel-mode driver responsible for handling push notification services, where improper type validation leads to memory corruption vulnerabilities. The vulnerability manifests when the system processes notification data structures that do not conform to expected type definitions, creating opportunities for attackers to manipulate memory layouts and execute arbitrary code with elevated privileges. According to CWE-415, this type confusion vulnerability falls under the category of improper handling of memory resources, where the system fails to validate the type consistency of objects during processing operations. The Windows Push Notifications service operates with elevated privileges to ensure proper delivery of system and application notifications, making this vulnerability particularly dangerous as it directly targets the kernel-level components that manage these critical services.
The technical exploitation of CVE-2025-50155 requires an attacker to first establish a legitimate user session on the target system, as the vulnerability is designed to work within the context of authenticated access. Attackers can leverage this flaw by crafting malicious notification payloads that trigger the type confusion during processing, potentially leading to privilege escalation from standard user to SYSTEM level access. The vulnerability's impact extends beyond simple local privilege escalation as it can be combined with other techniques to achieve persistent access or lateral movement within a network environment. The exploitation mechanism involves manipulating data structures that are expected to be of a specific type but are instead processed as different types, causing memory corruption that can be leveraged to execute code. This type of vulnerability is particularly challenging to detect and mitigate as it occurs within kernel-level operations where traditional user-mode protections are insufficient.
The operational impact of CVE-2025-50155 presents significant risks to enterprise environments where Windows systems are deployed, particularly in scenarios where users have legitimate access to systems but could potentially be compromised through social engineering or other attack vectors. The vulnerability's presence in the Windows Push Notifications service means that any system with this component enabled could be at risk, regardless of the specific applications installed or the network configuration. Security teams must consider this vulnerability as part of their overall threat landscape, especially when evaluating attack paths that could lead to system compromise and data exfiltration. The vulnerability's exploitation typically results in complete system compromise, as attackers can leverage the elevated privileges to install backdoors, modify system configurations, or access sensitive data. This aligns with ATT&CK technique T1068 which describes the use of local privilege escalation to gain SYSTEM-level access.
Mitigation strategies for CVE-2025-50155 should focus on both immediate patching and operational security measures. Microsoft has released security updates addressing this vulnerability, and organizations must prioritize deployment of these patches across all affected systems. Additionally, implementing network segmentation and access controls can limit the potential impact of exploitation, while monitoring for unusual notification processing patterns may help detect attempted exploitation. The vulnerability's nature suggests that attackers might attempt to leverage it in conjunction with other techniques, making comprehensive security monitoring essential. Organizations should also consider disabling unnecessary push notification services where possible, particularly in environments where the risk of compromise is high. Regular security assessments and vulnerability scanning should include checks for this specific vulnerability, as well as related type confusion issues that may exist in similar components. The mitigation approach should align with defense-in-depth principles, combining timely patch management with operational security controls to reduce the attack surface and limit potential exploitation success.