CVE-2026-26240 File Station 5
Remote attackers can exploit a buffer overflow in QNAP File Station 5 to modify memory, potentially leading to code execution or service crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-26240?
CVE-2026-26240 is a low-severity memory corruption vulnerability in Qnap File Station, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A buffer overflow vulnerability has been reported to affect File Station 5. The remote attackers can then exploit the vulnerability to modify memory or crash processes.
We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5243 and later
Weakness: CWE-121
Which versions are affected by CVE-2026-26240?
It affects 1 product.
Products include Qnap File Station.
How do I fix CVE-2026-26240?
No fix has been published for CVE-2026-26240 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-2026-26240 being exploited?
There is no known exploitation of CVE-2026-26240 in the wild and no public exploit code.
Other vulnerabilities in Qnap File Station
Sources
Also known as GHSA-872q-mhr9-36mh.