Cross-Site Scripting Vulnerability in Notes Station 3 by QNAP
CVE-2026-39991

4.8MEDIUM

Key Information:

Vendor

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

What is CVE-2026-39991?

A cross-site scripting vulnerability in Notes Station 3 allows remote attackers to exploit user accounts and inject malicious code. Users can mitigate risks by updating to Notes Station 3 version 3.9.12 or later, where this vulnerability has been addressed.

Affected Version(s)

Notes Station 3 3.9.x < 3.9.12

References

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

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ahmad Mamdouh
.