QTS

Summary

CVE	CVE-2025-66276
State	PUBLISHED
Assigner	qnap
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-06-10 03:16:24 UTC
Updated	2026-06-10 03:16:24 UTC
Description	QuTS hero is not affected. We have already fixed the vulnerability in the following version: QTS 5.2.7.3256 build 20250913 and later

Risk And Classification

Primary CVSS: v4.0 9.2 CRITICAL from [email protected]

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Version	Source	Type	Score	Severity	Vector
4.0	[email protected]	Secondary	9.2	CRITICAL	`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...`
4.0	CNA	CVSS	9.2	CRITICAL	`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

CVSS v4.0 Breakdown

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

Present

Privileges Required

None

User Interaction

None

Confidentiality

High

Integrity

High

Availability

High

Sub Conf.

None

Sub Integrity

None

Sub Availability

None

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	QNAP Systems Inc.	QTS	affected 5.2.0 5.2.7.3256 build 20250913 custom	Not specified
CNA	QNAP Systems Inc.	QuTS Hero	unaffected ?	Not specified

References

Reference	Source	Link	Tags
www.qnap.com/en/security-advisory/qsa-25-56	[email protected]	www.qnap.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Víctor A. Morales (en)

Additional Advisory Data

Solutions

CNA: We have already fixed the vulnerability in the following version: QTS 5.2.7.3256 build 20250913 and later

There are currently no legacy QID mappings associated with this CVE.