What is the CVSS score of CVE-2025-48721?

CVE-2025-48721 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Quts Hero are affected by CVE-2025-48721?

Organizations using A buffer overflow vulnerability should be aware of notable risk from CVE-2025-48721, a buffer overflow vulnerability rated CVSS 6.5.

How to fix or mitigate CVE-2025-48721?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Quts Hero CVE-2025-48721

MEDIUM

Classic Buffer Overflow (CWE-120)

2026-01-02 security@qnapsecurity.com.tw

Qnap Buffer Overflow Denial Of Service Quts Hero Qts

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 02, 2026 - 16:16 nvd

MEDIUM 6.5

DescriptionCVE.org

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

We have already fixed the vulnerability in the following version: QTS 5.2.8.3332 build 20251128 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 an administrator account, they can then exploit the vulnerability to modify memory or crash processes.

We have already fixed the vulnerability in the following version: QTS 5.2.8.3332 build 20251128 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.