File Path Control Flaw in HBS 3 Hybrid Backup Sync by QNAP
CVE-2025-62842

7HIGH

Key Information:

Vendor

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

What is CVE-2025-62842?

A file path control vulnerability has been identified in HBS 3 Hybrid Backup Sync, affecting users with local network access. An attacker leveraging this flaw can potentially gain unauthorized access to read or modify sensitive files and directories. This issue is mitigated in versions 26.2.0.938 and later, so users are strongly encouraged to update to the latest release to protect their data.

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Deploy the Patch

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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