CVE-2026-26239

HIGHCVSS 8.1/10EPSS 0.29%

Last modified

CVE-2026-26239 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

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

Metrics

Weakness Enumeration

Affected Software

VendorProductVersions
QnapFile Station>= 5.5.6.4691, < 5.5.6.5208

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2026-26239?
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
How severe is CVE-2026-26239?
CVE-2026-26239 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.
How do I fix CVE-2026-26239?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST