# CVE-2025-54149: Qsync Central

> A local attacker with a user account can exploit uncontrolled resource consumption in Qsync Central to launch a denial-of-service attack.

- **Severity:** Medium 4.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U`)
- **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:** 11 Feb 2026
- **Updated:** 11 Feb 2026
- **Also known as:** GHSA-39q6-v89p-42vg

## What is CVE-2025-54149?

CVE-2025-54149 is a medium-severity denial of service vulnerability in Qnap Qsync Central, published on 11 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An uncontrolled resource consumption vulnerability has been reported to affect Qsync Central. If a local attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.

We have already fixed the vulnerability in the following version:
Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

Weakness: CWE-789 (Memory Allocation with Excessive Size Value), CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2025-54149?

It affects 1 product.


Products: Qnap Qsync Central.

## How do I fix CVE-2025-54149?

No fix has been published for CVE-2025-54149 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-54149 being exploited?

There is no known exploitation of CVE-2025-54149 in the wild and no public exploit code.

## Other vulnerabilities in Qnap Qsync Central

- [CVE-2025-29892](https://insights.sbomify.com/CVE-2025-29892/): Qsync Central (high 8.7)
- [CVE-2025-53595](https://insights.sbomify.com/CVE-2025-53595/): Qsync Central (high 8.6)
- [CVE-2025-54153](https://insights.sbomify.com/CVE-2025-54153/): Qsync Central (high 8.6)
- [CVE-2025-30277](https://insights.sbomify.com/CVE-2025-30277/): Qsync Central (high 8.3)
- [CVE-2025-30278](https://insights.sbomify.com/CVE-2025-30278/): Qsync Central (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-54149 and fix it if it is affected.

What it is: CVE-2025-54149 is a medium-severity denial of service vulnerability in Qnap Qsync Central, published on 11 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-54149 in the wild and no public exploit code.

Affected product: Qnap Qsync Central. 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-2025-54149/ (Markdown: https://insights.sbomify.com/CVE-2025-54149/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-54149
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-54149
- OSV: https://osv.dev/vulnerability/CVE-2025-54149

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-54149/
Summaries are generated and may contain mistakes; the official description above is the record.