What is CVE-2026-26241?

CVE-2026-26241 is a critical-severity vulnerability in Qnap File_station, classified under Stack-based Buffer Overflow. CVSS score: 9.1/10. Published 2026-06-10.

How severe is CVE-2026-26241?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Buffer overflow in Qnap File_station

CVE-2026-26241

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: Fil…

Vulnerability class: Buffer Overflow

EPSS: 0.005 (37.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Qnap File_station
Qnap Systems Inc. File Station 5 — versions 5.5.0

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

security@qnapsecurity.com.tw (Broken Link)
security@qnapsecurity.com.tw

Frequently asked questions

What is CVE-2026-26241?: CVE-2026-26241 is a critical-severity vulnerability in Qnap File_station, classified under Stack-based Buffer Overflow. CVSS score: 9.1/10. Published 2026-06-10.
How severe is CVE-2026-26241?: Critical severity. CVSS v3 base score is 9.1 out of 10.