CVE-2026-34009: CWE-653 in QNAP Systems Inc. Notes Station 3
Description
An improper isolation or compartmentalization vulnerability has been reported to affect Notes Station 3. If a local 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 version: Notes Station 3 3.9.11 and later
CVSS v4.0
Score 8.4high
Affected software
QNAP Systems Inc.
Notes Station 3
pkg:github/qnap/notes-station-3Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Notes Station 3 involves improper isolation or compartmentalization (CWE-653), allowing a local attacker who already has administrator access to further compromise the system's security. The vulnerability affects versions starting from 3.9.x up to but not including 3.9.11. The vendor has addressed the issue in version 3.9.11.
Potential Impact
An attacker with local administrator privileges can exploit this vulnerability to compromise the security of the system, potentially leading to unauthorized actions or access beyond intended boundaries. The CVSS 4.0 score is 8.4 (high), reflecting significant impact on confidentiality, integrity, and availability when exploited by a privileged local user.
Mitigation Recommendations
Upgrade Notes Station 3 to version 3.9.11 or later, where the vulnerability has been fixed. Applying this official fix will mitigate the risk associated with this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- qnap
- Date Reserved
- 2026-03-25T06:18:24.664Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad0a18a2cdf04f65621d7a4
Added to database: 10/15/2026, 09:48:58 UTC
Last enriched: 10/15/2026, 10:04:14 UTC
Last updated: 10/15/2026, 19:00:27 UTC
Views: 14
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