CVE-2025-66276: Vulnerability in QNAP Systems Inc. QTS
A critical vulnerability (CVE-2025-66276) affects QNAP Systems Inc. QTS, specifically version 5. 2. 0. The vulnerability has a high CVSS 4. 0 score of 9. 2, indicating network attack vector with no privileges or user interaction required and high impact on confidentiality, integrity, and availability. QuTS hero is not affected. The issue is fixed starting from QTS version 5. 2.
AI Analysis
Technical Summary
CVE-2025-66276 is a critical security vulnerability in QNAP QTS software version 5.2.0. It allows an unauthenticated attacker to perform a network attack with low complexity and no user interaction, resulting in high impact on confidentiality, integrity, and availability of the affected system. The vulnerability is not present in QuTS hero. The vendor has fixed this vulnerability in QTS version 5.2.7.3256 build 20250913 and subsequent releases.
Potential Impact
The vulnerability allows remote attackers to compromise confidentiality, integrity, and availability of QTS 5.2.0 systems without requiring privileges or user interaction. This can lead to severe system compromise or data breaches on affected devices.
Mitigation Recommendations
Upgrade affected QTS installations to version 5.2.7.3256 build 20250913 or later, where the vulnerability has been fixed. No other mitigation or temporary workaround is indicated.
CVE-2025-66276: Vulnerability in QNAP Systems Inc. QTS
Description
A critical vulnerability (CVE-2025-66276) affects QNAP Systems Inc. QTS, specifically version 5. 2. 0. The vulnerability has a high CVSS 4. 0 score of 9. 2, indicating network attack vector with no privileges or user interaction required and high impact on confidentiality, integrity, and availability. QuTS hero is not affected. The issue is fixed starting from QTS version 5. 2.
CVSS v4.0
Score 9.2critical
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-66276 is a critical security vulnerability in QNAP QTS software version 5.2.0. It allows an unauthenticated attacker to perform a network attack with low complexity and no user interaction, resulting in high impact on confidentiality, integrity, and availability of the affected system. The vulnerability is not present in QuTS hero. The vendor has fixed this vulnerability in QTS version 5.2.7.3256 build 20250913 and subsequent releases.
Potential Impact
The vulnerability allows remote attackers to compromise confidentiality, integrity, and availability of QTS 5.2.0 systems without requiring privileges or user interaction. This can lead to severe system compromise or data breaches on affected devices.
Mitigation Recommendations
Upgrade affected QTS installations to version 5.2.7.3256 build 20250913 or later, where the vulnerability has been fixed. No other mitigation or temporary workaround is indicated.
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: 6/10/2026, 2:25:44 AM
Last enriched: 6/10/2026, 2:40:39 AM
Last updated: 6/10/2026, 3:31:27 AM
Views: 6
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