Answer in brief
CVE-2025-62839 records a High severity (CVSS 8.7) vulnerability in Hard-coded Cryptographic Key #1. The current sources do not mark it as known exploited. The current feed maps QNAP Systems Inc./HBS 3 Hybrid Backup Sync (generic), QNAP Systems Inc./Hybrid Backup Sync (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps QNAP Systems Inc./HBS 3 Hybrid Backup Sync (generic), QNAP Systems Inc./Hybrid Backup Sync (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| QNAP Systems Inc./HBS 3 Hybrid Backup Syncgeneric | >=26.4.x <26.4.0.521 | 26.4.0.521 |
| QNAP Systems Inc./Hybrid Backup Syncgeneric | >=26.4.x <26.4.0.521 || >=26.4.x <26.4.1.563 | 26.4.0.521, 26.4.1.563 |
Published upstream
Oct 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 29, 2026
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
Quoted source text, attributed separately from HOL analysis.