# CVE-2025-30265: QTS, QuTS hero

> Remote authenticated attackers can exploit a buffer overflow in QNAP operating systems to modify memory or crash processes.

- **Severity:** Low 2.3 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Aug 2025
- **Updated:** 29 Aug 2025
- **Also known as:** GHSA-w7x8-hj56-mff5

## What is CVE-2025-30265?

CVE-2025-30265 is a low-severity memory corruption vulnerability in Qnap Qts, published on 29 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes.

We have already fixed the vulnerability in the following versions:
QTS 5.2.5.3145 build 20250526 and later
QuTS hero h5.2.5.3138 build 20250519 and later

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2025-30265?

It affects 2 products.


Products: Qnap Qts, Qnap Quts Hero.

## How do I fix CVE-2025-30265?

No fix has been published for CVE-2025-30265 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-30265 being exploited?

There is no known exploitation of CVE-2025-30265 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-2025-30265 and fix it if it is affected.

What it is: CVE-2025-30265 is a low-severity memory corruption vulnerability in Qnap Qts, published on 29 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-30265 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-2025-30265/ (Markdown: https://insights.sbomify.com/CVE-2025-30265/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-30265
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-30265
- OSV: https://osv.dev/vulnerability/CVE-2025-30265

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-30265/
Summaries are generated and may contain mistakes; the official description above is the record.