CVE-2026-24723: QNAP File Station 5 NULL pointer dereference

CVE-2026-24723 · Severity: medium · CVSS 6.5 · Published 2026-10-15

File Station 5 is a file management application on QNAP NAS devices. A NULL pointer dereference vulnerability allows authenticated remote attackers to crash the service, causing a denial-of-service and making stored files temporarily unavailable.

Technologies: QNAP File Station, QNAP File Station 5. Vendors: QNAP.

Quick answers

Is CVE-2026-24723 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-24723 being exploited in the wild.
How severe is CVE-2026-24723?
Medium severity, with a CVSS score of 6.5, published 15 October 2026.
Which products and versions are affected?
QNAP File Station 5 before 5.5.6.5243.
Is there a fix for CVE-2026-24723?
Yes: fixed in File Station 5 5.5.6.5243 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-24723 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-24723?
Check whether you run QNAP File Station or QNAP File Station 5 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: File Station 5 5.5.6.5243 and later

Technical details

A NULL pointer dereference in File Station 5 allows an authenticated remote attacker to trigger a denial-of-service condition. The vulnerability requires a valid user account on the NAS device and can be exploited over the network. An attacker gains the ability to crash the File Station service, disrupting access to files.

Affected products

  • QNAP File Station 5 before 5.5.6.5243

Timeline

  • 2026-10-15: advisory

References

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