CVE-2025-66276: Vulnerability in QNAP Systems Inc. QTS
QuTS hero is not affected. We have already fixed the vulnerability in the following version: QTS 5.2.7.3256 build 20250913 and later
AI Analysis
Technical Summary
CVE-2025-66276 is a critical security vulnerability in QNAP QTS version 5.2.0, with a CVSS 4.0 base score of 9.2. The vulnerability allows remote attackers to exploit it over the network without user interaction and with low attack complexity. The vulnerability has high impact on confidentiality, integrity, and availability. The vendor has fixed the vulnerability starting from QTS version 5.2.7.3256 build 20250913. QuTS hero is confirmed not affected.
Potential Impact
The vulnerability poses a critical risk due to its high CVSS score (9.2) and network attack vector with no required privileges or user interaction. It can lead to severe compromise of confidentiality, integrity, and availability of the affected QTS system. No known exploits in the wild have been reported yet.
Mitigation Recommendations
Upgrade affected QTS installations to version 5.2.7.3256 build 20250913 or later, where the vulnerability has been fixed. QuTS hero users are not affected and do not require action. Patch status is confirmed by vendor advisory information.
CVE-2025-66276: Vulnerability in QNAP Systems Inc. QTS
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
CVSS v4.0
Score 9.2critical
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-66276 is a critical security vulnerability in QNAP QTS version 5.2.0, with a CVSS 4.0 base score of 9.2. The vulnerability allows remote attackers to exploit it over the network without user interaction and with low attack complexity. The vulnerability has high impact on confidentiality, integrity, and availability. The vendor has fixed the vulnerability starting from QTS version 5.2.7.3256 build 20250913. QuTS hero is confirmed not affected.
Potential Impact
The vulnerability poses a critical risk due to its high CVSS score (9.2) and network attack vector with no required privileges or user interaction. It can lead to severe compromise of confidentiality, integrity, and availability of the affected QTS system. No known exploits in the wild have been reported yet.
Mitigation Recommendations
Upgrade affected QTS installations to version 5.2.7.3256 build 20250913 or later, where the vulnerability has been fixed. QuTS hero users are not affected and do not require action. Patch status is confirmed by vendor advisory information.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- qnap
- Date Reserved
- 2025-11-26T09:25:37.832Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a28cb288dd33fbd85cc5d2e
Added to database: 06/10/2026, 02:25:44 UTC
Last enriched: 06/17/2026, 08:50:50 UTC
Last updated: 07/31/2026, 19:22:56 UTC
Views: 97
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