What is CVE-2025-57709?

CVE-2025-57709 is a high-severity vulnerability in Qnap Qsync_central, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-02-11.

How severe is CVE-2025-57709?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Qnap Qsync_central

CVE-2025-57709

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in…

Vulnerability class: Buffer Overflow

EPSS: 0.005 (41.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Qnap Qsync_central
Qnap Systems Inc. Qsync Central — versions 5.0.x.x

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow
CWE-787 — Out-of-bounds Write

References

security@qnapsecurity.com.tw (Vendor Advisory)

Frequently asked questions

What is CVE-2025-57709?: CVE-2025-57709 is a high-severity vulnerability in Qnap Qsync_central, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-02-11.
How severe is CVE-2025-57709?: High severity. CVSS v3 base score is 8.1 out of 10.