# CVE-2025-62843: QuRouter

> Attackers with physical access can bypass communication channel restrictions to gain unauthorized privileges on QNAP QuRouter devices.

- **Severity:** Low 0.9 (`CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:U`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Mar 2026
- **Updated:** 25 Mar 2026
- **Also known as:** GHSA-v9ww-wgw5-f4f7

## What is CVE-2025-62843?

CVE-2025-62843 is a low-severity vulnerability in QNAP Systems Inc. QuRouter, published on 20 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An improper restriction of communication channel to intended endpoints vulnerability has been reported to affect QHora. If an attacker gains physical access, they can then exploit the vulnerability to gain the privileges that were intended for the original endpoint.

We have already fixed the vulnerability in the following version:
QuRouter 2.6.3.009 and later

Weakness: CWE-923 (Improper Restriction of Communication Channel to Intended Endpoints)

## Which versions are affected by CVE-2025-62843?

It affects 1 product.


Products: Qnap Qurouter.

## How do I fix CVE-2025-62843?

No fix has been published for CVE-2025-62843 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-62843 being exploited?

There is no known exploitation of CVE-2025-62843 in the wild and no public exploit code.

## Other vulnerabilities in QNAP Systems Inc. QuRouter

- [CVE-2024-50389](https://insights.sbomify.com/CVE-2024-50389/): QuRouter (critical 9.5)
- [CVE-2024-48860](https://insights.sbomify.com/CVE-2024-48860/): QHora (critical 9.5)
- [CVE-2024-50390](https://insights.sbomify.com/CVE-2024-50390/): QHora (high 7.7)
- [CVE-2025-62846](https://insights.sbomify.com/CVE-2025-62846/): QuRouter (high 7.3)
- [CVE-2024-48861](https://insights.sbomify.com/CVE-2024-48861/): QHora (high 7.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-62843 and fix it if it is affected.

What it is: CVE-2025-62843 is a low-severity vulnerability in QNAP Systems Inc. QuRouter, published on 20 Mar 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-2025-62843 in the wild and no public exploit code.

Affected product: QNAP Systems Inc. QuRouter. 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-2025-62843/ (Markdown: https://insights.sbomify.com/CVE-2025-62843/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-62843
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-62843
- OSV: https://osv.dev/vulnerability/CVE-2025-62843

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-62843/
Summaries are generated and may contain mistakes; the official description above is the record.