CVE-2025-66280: CWE-190 in QNAP Systems Inc. QTS
An integer overflow or wraparound 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 compromise the security of the system. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3397 build 20260206 and later
AI Analysis
Technical Summary
This vulnerability involves an integer overflow or wraparound issue in QNAP Systems Inc.'s QTS operating system. Exploitation requires the attacker to have administrator-level access, after which the vulnerability can be leveraged to compromise the system's security. The vendor has addressed the issue in QTS 5.2.9.3410 build 20260214 and later, and in QuTS hero versions h5.2.9.3410 build 20260214 and later, h5.3.4.3500 build 20260520 and later, and h6.0.0.3397 build 20260206 and later. No known exploits are reported in the wild.
Potential Impact
Successful exploitation requires administrator privileges and can lead to system compromise. The vulnerability is rated medium severity with a CVSS 4.0 score of 5.1. There are no reports of active exploitation in the wild.
Mitigation Recommendations
The vulnerability has been fixed in QTS 5.2.9.3410 build 20260214 and later, and in the specified QuTS hero versions. Users should upgrade to these fixed versions to remediate the vulnerability. No additional mitigation guidance is provided or necessary beyond applying the official patches.
CVE-2025-66280: CWE-190 in QNAP Systems Inc. QTS
Description
An integer overflow or wraparound 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 compromise the security of the system. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3397 build 20260206 and later
CVSS v4.0
Score 5.1medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound issue in QNAP Systems Inc.'s QTS operating system. Exploitation requires the attacker to have administrator-level access, after which the vulnerability can be leveraged to compromise the system's security. The vendor has addressed the issue in QTS 5.2.9.3410 build 20260214 and later, and in QuTS hero versions h5.2.9.3410 build 20260214 and later, h5.3.4.3500 build 20260520 and later, and h6.0.0.3397 build 20260206 and later. No known exploits are reported in the wild.
Potential Impact
Successful exploitation requires administrator privileges and can lead to system compromise. The vulnerability is rated medium severity with a CVSS 4.0 score of 5.1. There are no reports of active exploitation in the wild.
Mitigation Recommendations
The vulnerability has been fixed in QTS 5.2.9.3410 build 20260214 and later, and in the specified QuTS hero versions. Users should upgrade to these fixed versions to remediate the vulnerability. No additional mitigation guidance is provided or necessary beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- qnap
- Date Reserved
- 2025-11-26T09:25:37.833Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a28dcc28dd33fbd85dba9ba
Added to database: 06/10/2026, 03:40:50 UTC
Last enriched: 06/17/2026, 08:53:58 UTC
Last updated: 07/31/2026, 19:22:56 UTC
Views: 55
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