CVE-2026-39991

A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code. We have already fixed the vulnerability in the following version: Notes Station 3 3.9.12 and later

Score

CVSS 4.0 4.8 Medium

Status

Awaiting Analysis - security@qnapsecurity.com.tw

Published

2026-10-15

Last modified

2026-10-19

Weaknesses

CWE-79

Affected products

• Notes Station 3 (Qnap Systems Inc.)

References

• https://www.qnap.com/en/app-release-notes?keyword=Notes%20Station%203&app=NotesStation3&product-line=nas