Use of Hard-Coded Cryptographic Key Vulnerability in HBS 3 Hybrid Backup Sync by QNAP
CVE-2025-62841

8.7HIGH

Key Information:

Vendor

QNAP
Status
Hbs 3 Hybrid Backup Sync
Hybrid Backup Sync
Vendor
CVE Published:
29 October 2026

What is CVE-2025-62841?

A vulnerability has been identified in HBS 3 Hybrid Backup Sync where a hard-coded cryptographic key could potentially be exploited by remote attackers. This could compromise the security of affected systems, allowing unauthorized access and possible data breaches. Users are advised to upgrade to version 26.4.0.521 or later for HBS 3 Hybrid Backup Sync and Hybrid Backup Sync to mitigate this risk.

Affected Version(s)

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

References

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

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Team DDOS
.