---
title: "CVE-2026-79551: Tenda Technology Co., Ltd NVR_4H CH3 - Hardcoded Credentials"
description: "Tenda Technology Co., Ltd NVR_4H CH3 v2.1 V27.5.58.6 contains a hardcoded cryptographic key caused by embedded static keys in the software, letting attackers potentially decrypt or tamper with encrypted data, exploit requires no special conditions."
url: https://panop.io/threat-heartbeat/CVE-2026-79551/
---

# CVE-2026-79551 Tenda Technology Co., Ltd NVR\_4H CH3 - Hardcoded Credentials

Tenda Technology Co., Ltd NVR\_4H CH3 v2.1 V27.5.58.6 contains a hardcoded cryptographic key caused by embedded static keys in the software, letting attackers potentially decrypt or tamper with encrypted data, exploit requires no special conditions.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Not required

EPSS

0.30% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-79551)

## Details

Type

Hardcoded Credentials

Impact

Weak Cryptography

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

15 September 2026

Updated

15 October 2026

Weakness

[CWE-321](https://cwe.mitre.org/data/definitions/321.html)

## Vendor fix

Update to the latest version that removes hardcoded cryptographic keys.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-79551](https://nvd.nist.gov/vuln/detail/CVE-2026-79551)
- [http://tenda.com](http://tenda.com/)
- [https://github.com/snyi001/CVE-2026-79551-Tenda](https://github.com/snyi001/CVE-2026-79551-Tenda)
- [https://www.tendacn.com/material/show/805569838370885](https://www.tendacn.com/material/show/805569838370885)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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