Critical severity · published Jun 10, 2026
CVE-2026-26241
File Station 5
9.1
CVSS
0.5%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FS
File Station 5 · QNAP Systems Inc.
5.5.0 before 5.5.6.5243 · source: vendor
FS
File Station · Qnap
5.5.6.4691 before 5.5.6.5243 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26241
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26241
www.qnap.com
https://www.qnap.com/en/security-advisory/qsa-26-10
More from File Station 5
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CVE-2026-26240
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8.1
CVE-2026-24724
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8.1
CVE-2026-26239
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6.5
CVE-2026-24723
NULL Pointer Dereference in utilRequest.cgi
6.5
CVE-2026-24722
Null Pointer Dereference in File Station 5