Sensitive Information Exposure in HBS 3 Hybrid Backup Sync by QNAP
CVE-2025-62840

7HIGH

Key Information:

Vendor

QNAP
Status
Hbs 3 Hybrid Backup Sync
Vendor
CVE Published:
2 January 2026

What is CVE-2025-62840?

A vulnerability has been identified in HBS 3 Hybrid Backup Sync, allowing attackers with local network access to expose sensitive information through generated error messages. This flaw can lead to unauthorized access to application data, posing significant risks to data integrity and security. The issue has been resolved in version 26.2.0.938 and later.

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Affected Version(s)

HBS 3 Hybrid Backup Sync 26.1.x < 26.2.0.938

References

https://www.qnap.com/en/security-advisory/qsa-25-46

CVSS V4

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Physical
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Pwn2Own 2025 - Team DDOS
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