CVE-2025-62839

Hard-coded Cryptographic Key #1

Published Oct 29, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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

Remediation

Vendor Solution

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

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Qnap
Qnap hybrid Backup Sync
Qnap Systems
Qnap Systems hbs 3 Hybrid Backup Sync
Qnap Systems Inc.
Qnap Systems Inc. hbs 3 Hybrid Backup Sync
Vendors & Products Qnap
Qnap hybrid Backup Sync
Qnap Systems
Qnap Systems hbs 3 Hybrid Backup Sync
Qnap Systems Inc.
Qnap Systems Inc. hbs 3 Hybrid Backup Sync
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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
Title Hard-coded Cryptographic Key #1
Weaknesses CWE-321
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
qnap
Published
Updated
Oct 29, 2026, 2:17 PM
Reserved
Oct 24, 2025, 2:43 AM
Status
Awaiting Analysis
Published
Oct 29, 2026, 8:16 AM
Modified
Nov 4, 2026, 8:10 PM