CVE-2026-24721 Null Pointer Dereference in File Station 5
A remote attacker with a user account can cause a denial-of-service in QNAP File Station 5 via a null pointer dereference.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-24721?
CVE-2026-24721 is a medium-severity vulnerability in Qnap File Station, published on 15 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5243 and later
Weakness: CWE-476
Which versions are affected by CVE-2026-24721?
It affects 1 product.
Products include Qnap File Station.
How do I fix CVE-2026-24721?
No fix has been published for CVE-2026-24721 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-24721 being exploited?
There is no known exploitation of CVE-2026-24721 in the wild and no public exploit code.
Other vulnerabilities in Qnap File Station
Sources
Also known as GHSA-mfr5-9c36-8rh4.