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High7.8QNAP

High [CVE-2025-62842] HBS: external control of file name or path vulnerability has been reported to affect HBS 3 Hybrid Backup Sync.

This high-severity QNAP advisory covers CVE-2025-62842 affecting HBS 3 Hybrid Backup Sync 26.1.x and earlier.

CVE-2025-62842 Published Jan 2, 2026Updated by vendor Jun 17, 2026
Affected products & platforms
QNAPBackup (HBS)
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Summary

An external control of file name or path vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If an attacker gains local network access, they can then exploit the vulnerability to read or modify files or directories.

We have already fixed the vulnerability in the following version: HBS 3 Hybrid Backup Sync 26.2.0.938 and later

Affected product named by the advisory: HBS 3 Hybrid Backup Sync 26.1.x and earlier.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Fixed versions
  • HBS 3 Hybrid Backup Sync 26.2.0.938 and later

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Update the affected QNAP app / operating system to a fixed release: HBS 3 Hybrid Backup Sync 26.2.0.938 and later.

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

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