CVE-2025-62841
High
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
SeverityHigh
CVSS8.7
Exploit probability—
ProductHybrid Backup Sync
PublishedOct 29, 2026
First seenNov 4, 2026
Weakness typeCWE-321CWE-321
How to fix
Update
- QNAP Systems Inc. Hybrid Backup Sync26.4.0.521, 26.4.1.563 or later
- QNAP Systems Inc. HBS 3 Hybrid Backup Sync26.4.0.521 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| QNAP Systems Inc. Hybrid Backup Sync | 26.4.x ≤ v < 26.4.0.521, 26.4.x ≤ v < 26.4.1.563 | 26.4.0.521, 26.4.1.563 |
| QNAP Systems Inc. HBS 3 Hybrid Backup Sync | 26.4.x ≤ v < 26.4.0.521 | 26.4.0.521 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.