CVE-2025-15641 PUBLISHED

Netskope Client Exposed IOCTL with Insufficient Access Controls

Assigner: Netskope
Reserved: 22.04.2026 Published: 17.06.2026 Updated: 17.06.2026

Netskope was notified about a potential gap in its Netskope Client for Windows systems where a malicious insider with administrative privileges can potentially tamper with the customer IOCTL by sending crafted IOCTL requests to the driver. A successful exploit can result in the bypassing of all anti-tampering protections for the NSClient.Affected Product(s) and Version(s) * Product Name: Netskope Client * Affected Platform: Windows * Affected Version: All version below R138

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 6.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	Netskope
Product	Netskope Client
Versions	Default: affected affected from 0 to 138 (excl.)

Exploits

Netskope is not aware of any active exploitation of the security issue.

Workarounds

No workaround available

Solutions

Use any of the below version of Netskope Client: * R138 and above * R135 (135.1.19.2670 and above ) * R132 (132.0.27.2671 and above )

Credits

Netskope credits Juan Pablo Barriga for reporting this flaw. finder

References

https://www.netskope.com/resources/netskope-resources/netskope-security-advisory-nskpsa-2025-007

Problem Types

CWE-782 Exposed IOCTL with insufficient access control CWE

Impacts

CAPEC-176 Configuration/Environment Manipulation