Executive Summary

CVE-2025-15642 is a security vulnerability in the Netskope Client for Windows systems. It arises from weak Discretionary Access Control Lists (DACLs) on the service object and related registry keys, combined with a lack of kernel-enforced self-protection in the client.

This weakness allows a malicious insider who already has administrative privileges on the system to bypass the NSClient Tamper Protections, potentially enabling them to manipulate or disable security features of the Netskope Client.

The vulnerability affects all versions of the Netskope Client below R138, and a security patch has been released in version R138 and above to fix this issue.

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Impact Analysis

This vulnerability can impact you by allowing a malicious insider with administrative privileges to bypass the NSClient Tamper Protections on the Netskope Client.

By bypassing these protections, the attacker could potentially disable or alter security controls, which may lead to unauthorized changes, reduced security monitoring, or other malicious activities on the affected Windows system.

Since the vulnerability requires administrative privileges, it primarily increases risk from insiders rather than external attackers.

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Detection Guidance

The vulnerability involves weak Discretionary Access Control Lists (DACLs) on the Netskope Client service object and related registry keys, which could be inspected to detect potential misconfigurations.

However, there are no specific detection commands or tools provided in the available information to identify this vulnerability on your network or system.

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Mitigation Strategies

The immediate mitigation step is to update the Netskope Client for Windows to version R138 or above, as this version contains the security patch addressing the vulnerability.

There are no available workarounds at this time, so applying the update is the recommended action to prevent exploitation.

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Compliance Impact

The provided information does not specify how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

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