CVE-2025-53596: QTS, QuTS hero
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 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 and later
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
QNAP QTSto a version that resolves this vulnerability.Fixed in 5.2.7.3256 - Upgrade
Upgrade
QNAP QuTS heroto a version that resolves this vulnerability.Fixed in h5.2.7.3256 - Upgrade
Upgrade
QNAP QuTS heroto a version that resolves this vulnerability.Fixed in h5.3.1.3250
Event History
Frequently Asked Questions
What is the severity of CVE-2025-53596?
CVE-2025-53596 has been categorized as a high severity vulnerability due to its potential to allow remote attackers to execute a denial-of-service attack.
How do I fix CVE-2025-53596?
To fix CVE-2025-53596, users should update their QNAP devices to the latest software versions as recommended by QNAP's security advisory.
Which QNAP versions are affected by CVE-2025-53596?
CVE-2025-53596 affects QNAP QTS versions up to 5.2.7.3256 and QuTS hero versions up to h5.2.7.3256 and h5.3.1.3250.
What exploitation method can attackers use for CVE-2025-53596?
Attackers with administrator access can exploit CVE-2025-53596 by performing a NULL pointer dereference, leading to potential denial-of-service conditions.
Is there a workaround for CVE-2025-53596?
Currently, the best approach to mitigate CVE-2025-53596 is to upgrade to the latest patched versions of QNAP operating systems.