# CVE-2025-53558: Hardcoded credentials in ZXHN-F660A

> Attackers can log in to ZTE ZXHN-F660T and ZXHN-F660A routers using common default credentials, leading to unauthorized access.

- **Severity:** High 8.7 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **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:** 31 Jul 2025
- **Updated:** 31 Jul 2025
- **Also known as:** GHSA-4xg9-h72c-fxfm

## What is CVE-2025-53558?

CVE-2025-53558 is a high-severity vulnerability in ZTE Japan. K.K. ZXHN-F660A, published on 31 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

ZXHN-F660T and ZXHN-F660A provided by ZTE Japan K.K. use a common credential for all installations. With the knowledge of the credential, an attacker may log in to the affected devices.

Weakness: CWE-1391 (Use of Weak Credentials)

## Which versions are affected by CVE-2025-53558?


## How do I fix CVE-2025-53558?

No fix has been published for CVE-2025-53558 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-53558 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-53558 exists.

Public exploit code:

- https://github.com/houqe/POC_CVE-2025-53558 (github_poc): https://github.com/houqe/POC_CVE-2025-53558
- ZTE ZXHN-F660T/F660A - Default Credentials (nuclei): http/cves/2025/CVE-2025-53558.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-53558 and fix it if it is affected.

What it is: CVE-2025-53558 is a high-severity vulnerability in ZTE Japan. K.K. ZXHN-F660A, published on 31 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-53558 exists.

Affected product: ZTE Japan. K.K. ZXHN-F660A. 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-2025-53558/ (Markdown: https://insights.sbomify.com/CVE-2025-53558/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-53558
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-53558
- OSV: https://osv.dev/vulnerability/CVE-2025-53558

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-53558/
Summaries are generated and may contain mistakes; the official description above is the record.