Hybrid Backup Sync
by Qnap
Standard maintenance is sufficient
Hybrid Backup Sync has low exploitation rates. Attackers rarely target this software's known vulnerabilities.
What to do
- Keep automatic updates enabled
- No urgent action needed
- Review periodically as part of normal maintenance
What Attackers Target
Vulnerabilities with high exploit probability
16.7%
Confirmed actively exploited (CISA)
16.7%
Public exploit code available
0.0%
Based on 6 known vulnerabilities. Percentages show the proportion that are actively dangerous — a low percentage means most vulnerabilities in this product are not being exploited.
Most Dangerous Vulnerabilities
| CVE | CVSS | Exploit Probability | Confirmed |
|---|---|---|---|
| CVE-2021-28799 | 10.0 | 91.1% | Yes |
| CVE-2024-50388 | 9.8 | 6.0% | — |
| CVE-2021-28809 | 9.8 | 0.6% | — |
| CVE-2024-53695 | 9.1 | 0.2% | — |
| CVE-2025-62842 | 7.8 | 0.0% | — |
| CVE-2025-62840 | 3.3 | 0.0% | — |
11
/ 100
low-risk
Active Threat
6/50 · Minimal
Exploit Availability
5/50 · Minimal
Score uses Wilson score intervals to account for sample size. Products with few CVEs are scored conservatively.