# CVE-2025-63834: Cross-site scripting in n/a

> Remote attackers can inject malicious scripts into the router's wireless settings, leading to code execution or account takeover when users visit the homepage.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 Nov 2025
- **Updated:** 1 Dec 2025
- **Also known as:** GHSA-3vc8-hhvv-jw47

## What is CVE-2025-63834?

CVE-2025-63834 is a medium-severity cross-site scripting vulnerability in Tenda Ac18 Firmware, published on 10 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A stored cross-site scripting (XSS) vulnerability was discovered in Tenda AC18 v15.03.05.05_multi. The vulnerability exists in the ssid parameter of the wireless settings. Remote attackers can inject malicious payloads that execute when any user visits the router's homepage.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2025-63834?

It affects 1 product.


Products: Tenda Ac18 Firmware.

## How do I fix CVE-2025-63834?

No fix has been published for CVE-2025-63834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-63834 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63834 exists.

## Other vulnerabilities in Tenda Ac18 Firmware

- [CVE-2024-57575](https://insights.sbomify.com/CVE-2024-57575/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57579](https://insights.sbomify.com/CVE-2024-57579/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57580](https://insights.sbomify.com/CVE-2024-57580/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57581](https://insights.sbomify.com/CVE-2024-57581/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57582](https://insights.sbomify.com/CVE-2024-57582/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-63834 and fix it if it is affected.

What it is: CVE-2025-63834 is a medium-severity cross-site scripting vulnerability in Tenda Ac18 Firmware, published on 10 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63834 exists.

Affected product: Tenda Ac18 Firmware. 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-2025-63834/ (Markdown: https://insights.sbomify.com/CVE-2025-63834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-63834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-63834
- OSV: https://osv.dev/vulnerability/CVE-2025-63834

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-63834/
Summaries are generated and may contain mistakes; the official description above is the record.