CVE-2025-62839highCWE-321

CVE-2025-62839: high-severity vulnerability in QNAP Systems Inc. HBS 3 Hybrid Backup Sync

Hard-coded Cryptographic Key #1

Published

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.2%
An use of hard-coded cryptographic key vulnerability has been reported to affect HBS 3 Hybrid Backup Sync and Hybrid Backup Sync. If exploited, the vulnerability could allow remote attackers to compromise the security of the system. We have already fixed the vulnerability in the following version: HBS 3 Hybrid Backup Sync 26.4.0.521 and later Hybrid Backup Sync 26.4.0.521 and later Hybrid Backup Sync 26.4.1.563 and later
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
QNAP Systems Inc. · HBS 3 Hybrid Backup SyncQNAP Systems Inc. · Hybrid Backup Sync
Related CVEs — QNAP Systems Inc. HBS 3 Hybrid Backup Sync

In the same product, most dangerous first.

CVE-2024-50388CRITICALHBS 3 Hybrid Backup SyncEPSS 2.3%CVE-2024-53695MEDIUMHBS 3 Hybrid Backup SyncEPSS 0.5%CVE-2025-62842HIGHHBS 3 Hybrid Backup SyncEPSS 0.3%CVE-2025-62841HIGHHard-coded Cryptographic Key #2EPSS 0.2%CVE-2025-62840HIGHHBS 3 Hybrid Backup SyncEPSS 0.2%