What is the CVSS score of CVE-2025-48725?

CVE-2025-48725 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Quts Hero are affected by CVE-2025-48725?

A high-severity buffer overflow vulnerability (CVE-2025-48725) affects QNAP NAS systems and requires authenticated access to exploit, but could allow attackers to crash services or modify system…

How to fix or mitigate CVE-2025-48725?

Within 24 hours: Inventory all QNAP systems, identify affected versions, and restrict network access to administration interfaces. Within 7 days: Implement network segmentation to limit QNAP device access to trusted networks only, enforce strong password policies, and disable unnecessary remote access features. Within 30 days: Monitor QNAP security advisories for patch availability and develop a deployment plan; consider evaluating alternative storage solutions if patches remain unavailable.

Quts Hero CVE-2025-48725

HIGH

Classic Buffer Overflow (CWE-120)

2026-02-11 security@qnapsecurity.com.tw

Qnap Buffer Overflow Denial Of Service Quts Hero Qts

8.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.1 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:02 vuln.today

CVE Published

Feb 11, 2026 - 13:15 nvd

HIGH 8.1

DescriptionCVE.org

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 fixed the vulnerability in the following version: QuTS hero h5.3.2.3354 build 20251225 and later

AnalysisAI

Technical ContextAI

Classified as CWE-120 (Classic Buffer Overflow). Affects Qts. 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 fixed the vulnerability in the following version: QuTS hero h5.3.2.3354 build 20251225 and later

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.