What is CVE-2025-48725?

CVE-2025-48725 is a high-severity vulnerability in Qnap Qts, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2026-02-11.

How severe is CVE-2025-48725?

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

Buffer overflow in Qnap Qts

CVE-2025-48725

A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fi…

Vulnerability class: Buffer Overflow

EPSS: 0.004 (31.6th 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 Qts — versions 5.2.0.2737, 5.2.0.2744, 5.2.0.2782
Qnap Quts_hero — versions h5.2.0.2737, h5.2.0.2782, h5.2.0.2789
Qnap Systems Inc. Quts Hero — versions h5.3.x

Weakness classification (CWE)

References

security@qnapsecurity.com.tw (Vendor Advisory)

Frequently asked questions

What is CVE-2025-48725?: CVE-2025-48725 is a high-severity vulnerability in Qnap Qts, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2026-02-11.
How severe is CVE-2025-48725?: High severity. CVSS v3 base score is 8.1 out of 10.