Improper Isolation Vulnerability in QNAP Notes Station 3
CVE-2026-34009

8.4HIGH

Key Information:

Vendor

QNAP
Status
Notes Station 3
Vendor
CVE Published:
15 October 2026

What is CVE-2026-34009?

An improper isolation or compartmentalization vulnerability has been identified in QNAP's Notes Station 3. If a local attacker obtains administrative access, they may exploit this flaw to undermine system security, potentially compromising sensitive information. It is crucial for users to upgrade to Notes Station 3 version 3.9.11 or later to mitigate this risk.

Affected Version(s)

Notes Station 3 3.9.x < 3.9.11

References

https://www.qnap.com/en/app-release-notes?keyword=Notes%2...
release-notes

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Runic Labs
.