CVE-2026-26239 File Station 5
Remote attackers with user accounts can exploit a buffer overflow in QNAP File Station 5 to modify memory or crash processes.
- 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-2026-26239?
CVE-2026-26239 is a medium-severity memory corruption vulnerability in Qnap File Station, published on 10 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A buffer overflow vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes.
We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5208 and later
Weakness: CWE-121
Which versions are affected by CVE-2026-26239?
It affects 1 product.
Products include Qnap File Station.
How do I fix CVE-2026-26239?
No fix has been published for CVE-2026-26239 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-26239 being exploited?
There is no known exploitation of CVE-2026-26239 in the wild and no public exploit code.
Other vulnerabilities in Qnap File Station
Sources
Also known as GHSA-82g9-7jh6-77wg.