CVE-2025-44013Network attack vector

Authenticated service interruption via NULL pointer dereference

Published Jan 2, 2026 · Updated Jan 2, 2026

NULL pointer dereference in QNAP QTS 5.2.x and QuTS hero h5.2.x allows remote authenticated users to interrupt NAS service via network requests. QNAP has not disclosed the affected component or the input path that reaches the invalid pointer dereference, so the exact request and failure mode remain unpublished. A valid user account is required; exploitation affects availability, with no reported data disclosure, modification, or unauthenticated reachability.

CVSS severity6.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in QNAP QTS 5.2.x and QuTS hero h5.2.x allows remote authenticated users to interrupt NAS service via network requests. QNAP has not disclosed the affected component or the input path that reaches the invalid pointer dereference, so the exact request and failure mode remain unpublished. A valid user account is required; exploitation affects availability, with no reported data disclosure, modification, or unauthenticated reachability.

The record

CVE
CVE-2025-44013
Published
Jan 2, 2026
Updated
Jan 2, 2026
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-476, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=h5.2.x <h5.2.6.3195 build 20250715

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Linn Products Limited · QuTS heroversion=h5.2.x <h5.2.6.3195 build 20250715
Linn Products Limited · QTSversion=5.2.x <5.2.6.3195 build 20250715

Published CVSS scores

6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1.3QNAP Systems, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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