A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Oct 15, 2026 · NIST NVD

   Detected

   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

2. Oct 15, 2026 · NIST NVD

   Updated

   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

Affected

• vendor QNAP Systems Inc. Notes Station 3version unspecified

Sources

• CIRCL Vulnerability LookupVulnerability recordCVE-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

  vulnerability.circl.lu
• CVE.orgVulnerability recordCVE-2026-39991

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-39991

  30-day exploitation probability 0.5%

  first.org
• NIST NVDVulnerability recordCVE-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

  nvd.nist.gov

References

• Reference · qnap.com