# CVE-2026-19412: Hardcoded Credentials Vulnerability in CP Plus CP-XR-DE21-S Router

> Hardcoded HTTP Digest credentials in CP Plus router firmware allow local attackers to gain unauthorized administrative access and perform privileged operations.

- **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:** 28 Aug 2026
- **Updated:** 28 Aug 2026
- **Also known as:** GHSA-3h26-q4ch-cw3m

## What is CVE-2026-19412?

CVE-2026-19412 is a high-severity vulnerability in CP-XR-DE21-S Router, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

This vulnerability exists in the CP Plus CP-XR-DE21-S Router due to the presence of hardcoded HTTP Digest authentication credentials in the firmware that are identical across all devices running the affected firmware. An attacker with access to the local network could exploit this vulnerability by obtaining the hardcoded authentication information from the firmware.

 

Successful exploitation of this vulnerability could allow the attacker to gain unauthorized administrative access and perform privileged operations on the targeted device.

Weakness: CWE-798 (Use of Hard-coded Credentials)

## Which versions are affected by CVE-2026-19412?


## How do I fix CVE-2026-19412?

No fix has been published for CVE-2026-19412 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19412 being exploited?

There is no known exploitation of CVE-2026-19412 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19412 and fix it if it is affected.

What it is: CVE-2026-19412 is a high-severity vulnerability in CP-XR-DE21-S Router, published on 28 Aug 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-2026-19412 in the wild and no public exploit code.

Affected product: CP-XR-DE21-S Router. 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-2026-19412/ (Markdown: https://insights.sbomify.com/CVE-2026-19412/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19412
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19412
- OSV: https://osv.dev/vulnerability/CVE-2026-19412

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19412/
Summaries are generated and may contain mistakes; the official description above is the record.