What is CVE-2025-62842?

CVE-2025-62842 is a high-severity vulnerability in Qnap Hybrid_backup_sync, classified under External Control of File Name or Path. CVSS score: 7.8/10. Published 2026-01-02.

How severe is CVE-2025-62842?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Qnap Hybrid_backup_sync

CVE-2025-62842

An external control of file name or path vulnerability has been reported to affect HBS 3 Hybrid Backup Sync. If an attacker gains local network access, they can then exploit the vulnerability to read or modify files or directories. We hav…

EPSS: 0.002 (13.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Qnap Hybrid_backup_sync
Qnap Systems Inc. Hbs 3 Hybrid Backup Sync — versions 26.1.x

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

security@qnapsecurity.com.tw (Vendor Advisory)

Frequently asked questions

What is CVE-2025-62842?: CVE-2025-62842 is a high-severity vulnerability in Qnap Hybrid_backup_sync, classified under External Control of File Name or Path. CVSS score: 7.8/10. Published 2026-01-02.
How severe is CVE-2025-62842?: High severity. CVSS v3 base score is 7.8 out of 10.