---
id: CVE-2025-62841
title: 'Hard-coded Cryptographic Key #2'
summary: >-
  An use of hard-coded cryptographic key vulnerability has been reported to
  affect HBS 3 Hybrid Backup Sync and Hybrid Backup Sync. If exploited, the
  vulnerability could allow remote attackers to compromise the security of the
  system.


  We …
severity: high
cvss: 8.7
cvssVector: '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'
cvssSource: cna
cwe:
  - CWE-321
vendor: QNAP Systems Inc.
product: HBS 3 Hybrid Backup Sync
affected:
  - hbs_3_hybrid_backup_sync >= 26.4.x < 26.4.0.521
  - hybrid_backup_sync >= 26.4.x < 26.4.0.521
  - hybrid_backup_sync >= 26.4.x < 26.4.1.563
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-29T14:15:52.238355Z'
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T14:16:06.907Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-62841'
references:
  - url: >-
      https://www.qnap.com/en/app-release-notes?keyword=HBS%203&app=HybridBackup&product-line=nas
  - url: >-
      https://www.qnap.com/en/app-release-notes?keyword=Hybrid&app=HybridBackup&product-line=nas
tags:
  - cve.org
epss: 0.00245
epssPercentile: 0.15813
ingestedAt: '2026-11-01T20:00:16.937Z'
---

## Overview

An use of hard-coded cryptographic key vulnerability has been reported to affect HBS 3 Hybrid Backup Sync and Hybrid Backup Sync. If exploited, the vulnerability could allow remote attackers to compromise the security of the system.

We have already fixed the vulnerability in the following version:
HBS 3 Hybrid Backup Sync 26.4.0.521 and later
Hybrid Backup Sync 26.4.0.521 and later
Hybrid Backup Sync 26.4.1.563 and later

## Affected

- `hbs_3_hybrid_backup_sync >= 26.4.x < 26.4.0.521`
- `hybrid_backup_sync >= 26.4.x < 26.4.0.521`
- `hybrid_backup_sync >= 26.4.x < 26.4.1.563`

## Remediation

We have already fixed the vulnerability in the following version:
HBS 3 Hybrid Backup Sync 26.4.0.521 and later
Hybrid Backup Sync 26.4.0.521 and later
Hybrid Backup Sync 26.4.1.563 and later