Qnap Hybrid Backup Sync — known CVE vulnerabilities

Every CVE whose affected-product data names Qnap Hybrid Backup Sync, ordered by CVSS severity, with EPSS exploit prediction and CISA KEV status.

CVEs (6)

• CVE-2021-28799 — CVSS 10.0 (critical) — actively exploited: An improper authorization vulnerability has been reported to affect QNAP NAS running HBS 3 (Hybrid Backup Sync. ) If exploited, the…
• CVE-2021-28809 — CVSS 9.8 (critical): An improper access control vulnerability has been reported to affect certain legacy versions of HBS 3. If exploited, this vulnerability…
• CVE-2024-50388 — CVSS 9.8 (critical): An OS command injection vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If exploited, the vulnerability could allow…
• CVE-2024-53695 — CVSS 9.1 (critical): A buffer overflow vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If exploited, the vulnerability could allow remote…
• CVE-2025-62842 — CVSS 7.8 (high): An external control of file name or path vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If an attacker gains local…
• CVE-2025-62840 — CVSS 3.3 (low): A generation of error message containing sensitive information vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If an…