Race Condition in Windows Clip Service Allows Privilege Escalation

Executive Summary

CVE-2026-50384 is a race condition vulnerability in the Windows Clip Service. A race condition occurs when multiple processes or threads access a shared resource without proper synchronization, leading to unpredictable behavior.

In this case, the vulnerability allows an authorized attacker with local access to exploit the improper synchronization in the Windows Clip Service. This could enable the attacker to elevate their privileges on the system, gaining higher levels of access than intended.

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Detection Guidance

The provided context does not include specific detection methods or commands for identifying the vulnerability CVE-2026-50384 on a network or system. This vulnerability involves a race condition in the Windows Clip Service, which may require specialized tools or techniques to detect.

To detect potential exploitation or the presence of this vulnerability, you may need to monitor for unusual behavior in the Windows Clip Service or check for updates and patches provided by Microsoft. The Microsoft Security Response Center (MSRC) may offer guidance on detection as part of their update guide.

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Impact Analysis

If you are affected by this vulnerability, an attacker with local access to your system could exploit it to elevate their privileges.

• This could allow the attacker to gain administrative or system-level access, enabling them to perform actions such as installing malware, accessing sensitive data, or modifying system configurations.
• The vulnerability requires the attacker to already have some level of authorized access to the system, so it is not remotely exploitable without prior access.

The CVSS base score of 7.0 indicates a high severity, meaning the impact could be significant if exploited.

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Compliance Impact

This vulnerability could impact compliance with standards and regulations in the following ways:

• GDPR: If the vulnerability is exploited to access or exfiltrate personal data, it could lead to a data breach. Organizations are required under GDPR to implement appropriate security measures to protect personal data, and failure to patch such vulnerabilities could be seen as a violation.
• HIPAA: For organizations handling protected health information (PHI), this vulnerability could result in unauthorized access to sensitive data. HIPAA requires safeguards to ensure the confidentiality, integrity, and availability of PHI, and exploitation of this vulnerability could violate those requirements.
• Other standards (e.g., ISO 27001, NIST): Many compliance frameworks require organizations to maintain secure systems and address vulnerabilities promptly. Failure to mitigate this vulnerability could result in non-compliance with these standards.

The specific impact on compliance depends on the nature of the data and systems affected, as well as the organization's ability to detect and respond to exploitation attempts.

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Mitigation Strategies

Apply the security update provided by Microsoft to address the race condition in the Windows Clip Service.

Refer to the official Microsoft security advisory for detailed patching instructions and additional mitigation guidance.

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