CVE-2025-62839 | QNAP Hybrid Backup Sync/Hybrid Backup Sync prior 26.4.0.521/26.4.1.563 hard-coded key

October 29, 2026 Yanac

A vulnerability was found in QNAP Hybrid Backup Sync and Hybrid Backup Sync. It has been rated as critical. Impacted is an unknown function. This manipulation causes use of hard-coded cryptographic key
.

This vulnerability appears as CVE-2025-62839. The attack may be initiated remotely. There is no available exploit.

Upgrading the affected component is advised.VulDB Recent EntriesRead More