---
id: CVE-2026-5527
title: A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53
summary: >-
  A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53.
  Affected by this issue is some unknown functionality of the file
  /etc/www/pem/server.key of the component ECDSA P-256 Private Key Handler. This
  manipulation c…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-320
  - CWE-321
vendor: tenda
product: 4g03_pro_firmware
affected:
  - 4g03_pro_firmware = 04.03.01.53
published: '2026-04-05'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5527'
references:
  - url: 'https://vuldb.com/submit/782053'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/355280'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/355280/cti'
    label: cna@vuldb.com
  - url: 'https://www.tenda.com.cn/'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00571
epssPercentile: 0.44836
ingestedAt: '2026-07-24T09:23:51.202Z'
---

## Overview

A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53. Affected by this issue is some unknown functionality of the file /etc/www/pem/server.key of the component ECDSA P-256 Private Key Handler. This manipulation causes use of hard-coded cryptographic key
 . It is possible to initiate the attack remotely.

## Affected

- `4g03_pro_firmware = 04.03.01.53`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.