CVE-2026-26239
Received Received - Intake
Buffer Overflow in QNAP File Station

Publication date: 2026-06-10

Last updated on: 2026-06-10

Assigner: QNAP Systems, Inc.

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
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Meta Information
Published
2026-06-10
Last Modified
2026-06-10
Generated
2026-06-10
AI Q&A
2026-06-10
EPSS Evaluated
N/A
NVD
CVE-2026-26239
EUVD
EUVD-2026-35979
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
qnap file_station From 5.5.6.5208 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

This vulnerability is a buffer overflow issue affecting File Station 5. It allows a remote attacker who has obtained a user account to exploit the vulnerability to modify memory or cause processes to crash.

Impact Analysis

If exploited, this vulnerability can allow an attacker to modify memory or crash processes on the affected system. This could lead to system instability, denial of service, or potentially unauthorized actions depending on the attacker's goals.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade File Station 5 to version 5.5.6.5208 or later, where the vulnerability has been fixed.

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