CVE-2024-53695: HBS 3 Hybrid Backup Sync

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-07 · updated 2026-06-17
Weakness: CWE-120

Description

A buffer overflow vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If exploited, the vulnerability could allow remote attackers to modify memory or crash processes. We have already fixed the vulnerability in the following version: HBS 3 Hybrid Backup Sync 25.1.4.952 and later

Affected products

QNAP Systems Inc. HBS 3 Hybrid Backup Sync: from 25.1.0.627 before 25.1.4.952 — fixed in 25.1.4.952

How to fix

Upgrade to a fixed version: QNAP Systems Inc. HBS 3 Hybrid Backup Sync 25.1.4.952. Check the vendor advisory for mitigations.

References

https://www.qnap.com/en/security-advisory/qsa-25-06

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