CVE-2026-24716

Modified Modified - Updated After Analysis

NULL Pointer Dereference DoS in QNAP QTS and QuTS hero

Publication date: 2026-06-10

Last updated on: 2026-06-30

Assigner: QNAP Systems, Inc.

Description

A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3492 build 20260507 and later QuTS hero h5.2.9.3499 build 20260514 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3459 build 20260409 and later

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-10

Last Modified

2026-06-30

Generated

2026-06-30

AI Q&A

2026-06-10

EPSS Evaluated

2026-06-29

NVD

CVE-2026-24716

EUVD

EUVD-2026-35975

Affected Vendors & Products

Vendor	Product	Version / Range
qnap	qts	From 5.2.0.2737 (inc) to 5.2.9.3492 (exc)
qnap	quts_hero	From h5.0.0 (inc) to h5.2.9.3499 (exc)
qnap	quts_hero	From h5.3.0.3115 (inc) to h5.3.4.3500 (exc)
qnap	quts_hero	From h6.0.0.3324 (inc) to h6.0.0.3459 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Impact Analysis

If exploited, this vulnerability can lead to a denial-of-service condition, making the affected QNAP system unavailable or unresponsive. This can disrupt normal operations and potentially cause downtime for services relying on the affected device.

Executive Summary

This vulnerability is a NULL pointer dereference issue affecting several versions of QNAP operating systems. It occurs when a remote attacker who already has an administrator account exploits this flaw to cause the system to crash or become unavailable, resulting in a denial-of-service (DoS) attack.

Mitigation Strategies

To mitigate this vulnerability, you should update your QNAP operating system to the fixed versions provided by the vendor.

Upgrade QTS to version 5.2.9.3492 build 20260507 or later.
Upgrade QuTS hero to version h5.2.9.3499 build 20260514 or later.
Upgrade QuTS hero to version h5.3.4.3500 build 20260520 or later.
Upgrade QuTS hero to version h6.0.0.3459 build 20260409 or later.

Additionally, restrict administrator account access to trusted users only, as exploitation requires an attacker to have administrator privileges.

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