CVE-2025-15641 Netskope CVE debrief

Who should care

Organizations using Netskope Client on Windows systems, especially those with administrative insider threats, should prioritize patching to prevent potential tampering with anti-tampering protections.

Technical summary

The vulnerability exists in the Netskope Client for Windows, where an administrative insider can send crafted IOCTL requests to the driver, bypassing anti-tampering protections. The affected product is Netskope Client on Windows, with all versions below R138 being vulnerable. This issue allows a malicious insider with administrative privileges to potentially tamper with the customer IOCTL, effectively bypassing all anti-tampering protections for the NSClient. To mitigate potential risks associated with this vulnerability, organizations should focus on restricting administrative access and monitoring for suspicious activities. Implementing additional security measures, such as enhanced logging and insider threat detection, can also help in managing the risk effectively.

Defensive priority

Medium priority due to the requirement for administrative privileges and the potential for insider threat exploitation. Organizations should focus on restricting administrative access and monitoring for suspicious activities to mitigate potential risks associated with this vulnerability. Implementing additional security measures, such as enhanced logging and insider threat detection, can also help in managing the risk effectively. It is crucial to apply the latest patch (R138 or later) for Netskope Client on Windows systems as part of a comprehensive defense strategy. Regular reviews of system configurations and user privileges are essential to prevent exploitation by malicious insiders. Furthermore, educating personnel about the risks associated with insider threats and the importance of adhering to security protocols can aid in preventing potential breaches. By taking these steps, organizations can enhance their security posture and reduce the likelihood of successful exploitation of this vulnerability. Given the medium priority, it is advisable to address this vulnerability in the context of broader security initiatives and risk management practices. The priority level suggests that while immediate action is not mandated, it should be included in the organization's security roadmap for timely remediation. Effective communication and coordination among IT, security, and management teams are vital to ensure that appropriate measures are implemented to address this vulnerability. Additionally, considering the insider threat aspect, organizations should evaluate their current threat detection and response capabilities to ensure they are adequately prepared to identify and mitigate potential attacks exploiting this vulnerability. This involves reviewing incident response plans and conducting regular security assessments to identify and address any gaps in defenses. By proactively addressing this vulnerability and enhancing overall security measures, organizations can better protect themselves against potential threats and maintain a robust security posture. Therefore, a medium defensive priority is assigned, reflecting the need for balanced and informed risk-based

Recommended defensive actions

• Apply the latest patch (R138 or later) for Netskope Client on Windows systems.
• Restrict administrative privileges to trusted personnel.
• Monitor for suspicious IOCTL requests to the Netskope Client driver.
• Implement additional logging and monitoring for insider threat detection.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record was published on 2026-06-17T13:19:13.070Z and last modified on 2026-06-17T16:18:58.823Z. The NVD entry is currently Awaiting Analysis. Official references are limited, but the vendor advisory (NSKPSA-2025-007) is available. The information provided is based on available data and may not be exhaustive. Further verification and analysis are recommended to ensure a comprehensive understanding of the vulnerability.

Official resources