CVE-2025-62841: An use of hard-coded cryptographic key vulnerability has been reported to affect HBS 3 Hybrid Backup
Source GCVE Database
Not known to be exploited · CVSS 8.7 High : upgrade to 26.4.0.521 soon.
Data as of 29 Oct 2026, 10:34 UTC
Thin evidence
One scorer or none| CNA (qnap) | CVSS 4.0 | 8.7 |
|---|
- Patch
- Available – fixed in 26.4.0.521, 26.4.1.563
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade HBS 3 Hybrid Backup Sync to 26.4.0.521; Hybrid Backup Sync to 26.4.1.563 or 26.4.0.521.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| QNAP Systems Inc.HBS 3 Hybrid Backup Sync | Affected
| Fixed in
|
| QNAP Systems Inc.Hybrid Backup Sync | Affected
| Fixed in
|
| QNAP Systems Inc.Hybrid Backup Sync | Affected
| Fixed in
|
AI-suggested
The vulnerability has been fixed in HBS 3 Hybrid Backup Sync version 26.4.0.521 and later, and Hybrid Backup Sync versions 26.4.0.521 and 26.4.1.563 and later. Users should upgrade to these versions or newer to remediate the issue.
Description
A hard-coded cryptographic key vulnerability has been identified in HBS 3 Hybrid Backup Sync and Hybrid Backup Sync. This flaw could allow remote attackers to compromise system security. The issue has been addressed and fixed in versions 26.4.0.521 and later for both products.