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PatchSiren cyber security CVE debrief

CVE-2025-62850 QNAP Systems Inc. CVE debrief

CVE-2025-62850 is a NULL pointer dereference vulnerability affecting several QNAP operating system versions. A remote attacker with administrator privileges can exploit this vulnerability to launch a denial-of-service (DoS) attack. The vulnerability has been fixed in QuTS hero h5.2.9.3410 build 20260214 and later, QuTS hero h5.3.4.3500 build 20260520 and later, and QuTS hero h6.0.0.3459 build 20260409 and later.

Vendor
QNAP Systems Inc.
Product
QuTS hero
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-15
Advisory published
2026-06-10
Advisory updated
2026-06-15

Who should care

Administrators of QNAP operating systems should apply the necessary patches to prevent exploitation of this vulnerability.

Technical summary

The vulnerability has a CVSS score of 5.1 and is classified as MEDIUM severity. It can be exploited by a remote attacker with high privileges, and it requires no user interaction.

Defensive priority

High

Recommended defensive actions

  • Apply the patches provided by QNAP: QuTS hero h5.2.9.3410 build 20260214 and later, QuTS hero h5.3.4.3500 build 20260520 and later, and QuTS hero h6.0.0.3459 build 20260409 and later.
  • Restrict access to administrator accounts to prevent exploitation.

Evidence notes

The vulnerability was reported to affect several QNAP operating system versions.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-62850 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-62850

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

  • CVE-2025-62850 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-62850

    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.