File Station 5 Buffer Overflow via Remote User Fixed in 5.5.6.5208
CVE-2026-26239 Published on June 10, 2026
File Station 5
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 Type
What is a Stack Overflow Vulnerability?
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).
CVE-2026-26239 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-26239
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Affected Versions
QNAP Systems Inc. File Station 5:- Version 5.5.0 and below 5.5.6.5208 is affected.