# CVE-2025-15641: Netskope Client Exposed IOCTL with Insufficient Access Controls

> A malicious insider with admin privileges can bypass anti-tampering protections in Netskope Client via crafted IOCTL requests.

- **Severity:** Medium 6.8 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Jun 2026
- **Updated:** 17 Jun 2026
- **Also known as:** GHSA-jv52-q48w-cm7j

## What is CVE-2025-15641?

CVE-2025-15641 is a medium-severity vulnerability in Netskope Client, published on 17 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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

Weakness: CWE-782 (Exposed IOCTL with Insufficient Access Control)

## Which versions are affected by CVE-2025-15641?


## How do I fix CVE-2025-15641?

No fix has been published for CVE-2025-15641 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-15641 being exploited?

There is no known exploitation of CVE-2025-15641 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-15641 and fix it if it is affected.

What it is: CVE-2025-15641 is a medium-severity vulnerability in Netskope Client, published on 17 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-15641 in the wild and no public exploit code.

Affected product: Netskope Client. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-15641/ (Markdown: https://insights.sbomify.com/CVE-2025-15641/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-15641
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-15641
- OSV: https://osv.dev/vulnerability/CVE-2025-15641

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-15641/
Summaries are generated and may contain mistakes; the official description above is the record.