Multiple vulnerabilities have been reported to affect File Station 5
https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-1907
This isn’t new news. My FS5 updated a few days ago to 5.5.6.xxx and is fine, thank you.
QNAP announced the CVE after releasing the updated software. This is usually how they do it. It’s not the worst idea. 
Thanks for sharing this information! The related security issue has been resolved. You can verify it by checking the CVE ID on this page: Security Advisories | QNAP
Additionally, you can find more security-related information on this page: QNAP’s Security commitment | QNAP ensures the highest level of data security