CVE-2025-62842 HBS 3 Hybrid Backup Sync
Attackers with local network access can read or modify files via path traversal in QNAP HBS 3 Hybrid Backup Sync.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-62842?
CVE-2025-62842 is a high-severity path traversal vulnerability in QNAP Systems Inc. HBS 3 Hybrid Backup Sync, published on 2 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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 have already fixed the vulnerability in the following version: HBS 3 Hybrid Backup Sync 26.2.0.938 and later
Weakness: CWE-73
Which versions are affected by CVE-2025-62842?
It affects 1 product.
Products include Qnap Hybrid Backup Sync.
How do I fix CVE-2025-62842?
No fix has been published for CVE-2025-62842 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-62842 being exploited?
There is no known exploitation of CVE-2025-62842 in the wild and no public exploit code.
Other vulnerabilities in QNAP Systems Inc. HBS 3 Hybrid Backup Sync
Sources
Also known as GHSA-mgp4-g6w6-2q2x.