What’s Vulnerable › Vulnerabilities

CVE-2025-62841: Hard-coded Cryptographic Key #2

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-29 · updated 2026-10-29
• Weakness: CWE-321

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

Affected products

• QNAP Systems Inc. HBS 3 Hybrid Backup Sync: from 26.4.x before 26.4.0.521 — fixed in 26.4.0.521

How to fix

Upgrade to a fixed version: QNAP Systems Inc. HBS 3 Hybrid Backup Sync 26.4.0.521. Check the vendor advisory for mitigations.

References

• https://www.qnap.com/en/app-release-notes?keyword=HBS%203&app=HybridBackup&product-line=nas
• https://www.qnap.com/en/app-release-notes?keyword=Hybrid&app=HybridBackup&product-line=nas

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