Buffer overflow in QNAP Hybrid Backup Sync
CVE-2024-53695
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
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (44.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- QNAP Hybrid Backup Sync
- QNAP Systems Inc. Hbs 3 Hybrid Backup Sync — versions 25.1.x
Weakness classification (CWE)
References
- www.qnap.com/en/security-advisory/qsa-25-06 (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-53695?
- CVE-2024-53695 is a critical-severity vulnerability in QNAP Hybrid Backup Sync, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.1/10. Published 2025-03-07.
- How severe is CVE-2024-53695?
- Critical severity. CVSS v3 base score is 9.1 out of 10.