# CVE-2025-53756: Cleartext Transmission Vulnerability in Digisol DG-GR6821AC Router

> Remote attackers can intercept cleartext credentials from the web interface to gain unauthorized access to the router.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jul 2025
- **Updated:** 16 Jul 2025
- **Also known as:** GHSA-4cmm-32xh-qc83

## What is CVE-2025-53756?

CVE-2025-53756 is a high-severity vulnerability in Digisol XPON ONU Wi-Fi Router (DG-GR6821AC), published on 16 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

This vulnerability exists in Digisol DG-GR6821AC Router due to cleartext transmission of credentials in its web management interface. A remote attacker could exploit this vulnerability by intercepting the network traffic and capturing cleartext credentials. 

Successful exploitation of this vulnerability could allow the attacker to gain unauthorized access to the targeted device.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information)

## Which versions are affected by CVE-2025-53756?


## How do I fix CVE-2025-53756?

No fix has been published for CVE-2025-53756 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-53756 being exploited?

There is no known exploitation of CVE-2025-53756 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-53756 and fix it if it is affected.

What it is: CVE-2025-53756 is a high-severity vulnerability in Digisol XPON ONU Wi-Fi Router (DG-GR6821AC), published on 16 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-53756 in the wild and no public exploit code.

Affected product: Digisol XPON ONU Wi-Fi Router (DG-GR6821AC). 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-2025-53756/ (Markdown: https://insights.sbomify.com/CVE-2025-53756/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-53756
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-53756
- OSV: https://osv.dev/vulnerability/CVE-2025-53756

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-53756/
Summaries are generated and may contain mistakes; the official description above is the record.