PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-22899 Qnap CVE debrief

CVE-2026-22899 is a NULL pointer dereference vulnerability affecting QNAP File Station 6. A remote attacker with a user account can exploit this vulnerability to launch a denial-of-service (DoS) attack. The vulnerability has been fixed in File Station 5 version 5.5.6.5208 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 6, particularly those with remote access or user accounts that could be compromised.

Technical summary

The vulnerability, identified as CWE-476, allows for a denial-of-service (DoS) attack if a remote attacker gains a user account. The CVSS score for this vulnerability is 5.3, indicating a medium severity.

Defensive priority

Medium

Recommended defensive actions

  • Update File Station 5 to version 5.5.6.5208 or later.
  • Restrict access to File Station 6 to trusted user accounts.
  • Monitor for suspicious activity on File Station 6.

Evidence notes

The CVE record and details were obtained from the official CVE.org and NVD databases.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-22899 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-22899

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

  • CVE-2026-22899 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-22899

    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.