# CVE-2025-48727: QTS, QuTS hero

> Remote administrators can trigger a denial-of-service attack via a NULL pointer dereference in QNAP operating systems.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Oct 2025
- **Updated:** 3 Oct 2025
- **Also known as:** GHSA-q53m-fm85-x9w5

## What is CVE-2025-48727?

CVE-2025-48727 is a medium-severity vulnerability in Qnap Qts, published on 3 Oct 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.

We have already fixed the vulnerability in the following versions:
QTS 5.2.6.3195 build 20250715 and later
QuTS hero h5.2.6.3195 build 20250715 and later

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2025-48727?

It affects 2 products.


Products: Qnap Qts, Qnap Quts Hero.

## How do I fix CVE-2025-48727?

No fix has been published for CVE-2025-48727 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-48727 being exploited?

There is no known exploitation of CVE-2025-48727 in the wild and no public exploit code.

## Other vulnerabilities in Qnap Qts

- [CVE-2020-2509](https://insights.sbomify.com/CVE-2020-2509/): QNAP Network-Attached Storage (NAS) Command Injection (critical 9.8, exploited in the wild)
- [CVE-2018-19949](https://insights.sbomify.com/CVE-2018-19949/): QNAP NAS File Station Command Injection (critical 9.8, exploited in the wild)
- [CVE-2019-7193](https://insights.sbomify.com/CVE-2019-7193/): QNAP QTS Improper Input Validation (critical 9.8, exploited in the wild)
- [CVE-2018-19943](https://insights.sbomify.com/CVE-2018-19943/): QNAP NAS File Station Cross-Site Scripting (high 8.0, exploited in the wild)
- [CVE-2018-19953](https://insights.sbomify.com/CVE-2018-19953/): QNAP NAS File Station Cross-Site Scripting (medium 6.1, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-48727 and fix it if it is affected.

What it is: CVE-2025-48727 is a medium-severity vulnerability in Qnap Qts, published on 3 Oct 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-48727 in the wild and no public exploit code.

Affected product: Qnap Qts. 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-2025-48727/ (Markdown: https://insights.sbomify.com/CVE-2025-48727/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-48727
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-48727
- OSV: https://osv.dev/vulnerability/CVE-2025-48727

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-48727/
Summaries are generated and may contain mistakes; the official description above is the record.