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PatchSiren cyber security CVE debrief

CVE-2026-26241 Qnap CVE debrief

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. This medium-severity vulnerability has been fixed in File Station 5 version 5.5.6.5243 and later.

Vendor
Qnap
Product
File Station
CVSS
LOW 1.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-17
Advisory published
2026-06-10
Advisory updated
2026-06-17

Who should care

Users of QNAP File Station 5, particularly those using versions prior to 5.5.6.5243, should apply the patch to prevent exploitation.

Technical summary

The vulnerability, tracked as CVE-2026-26241, is a buffer overflow issue in File Station 5. It has a CVSS score of 5.3 and is considered medium-severity. The vulnerability allows remote attackers to exploit the system, potentially leading to memory modification or process crashes.

Defensive priority

Medium

Recommended defensive actions

  • Apply the patch: Upgrade to File Station 5 version 5.5.6.5243 or later.
  • Review and update: Ensure all instances of File Station 5 are running the patched version.

Evidence notes

The vulnerability was reported and patched by QNAP. The CVE record and NVD details provide additional context.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-26241 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-26241

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-26241 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-26241

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.