CVE-2025-62848 in QTS
Summary
by MITRE • 12/16/2025
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following versions: QTS 5.2.7.3297 build 20251024 and later QuTS hero h5.2.7.3297 build 20251024 and later QuTS hero h5.3.1.3292 build 20251024 and later
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Analysis
by VulDB Data Team • 12/17/2025
This vulnerability represents a critical null pointer dereference flaw within QNAP operating system implementations that affects multiple product lines including QTS and QuTS hero versions. The issue stems from improper input validation mechanisms that fail to adequately check for null references before attempting to access memory locations, creating a predictable execution path that leads to system instability. Such vulnerabilities fall under the CWE-476 category of NULL Pointer Dereference, which is classified as a fundamental programming error that can be exploited by malicious actors to disrupt system operations. The vulnerability specifically impacts QNAP devices running versions prior to the patched releases, with the affected systems including QTS 5.2.7.3297 build 20251024 and related QuTS hero variants.
The exploitation of this vulnerability enables remote attackers to execute denial-of-service attacks against targeted QNAP devices without requiring authentication or elevated privileges. This represents a significant security risk as the attack can be launched from external networks and does not require specialized access to the system. The null pointer dereference occurs during normal operational procedures when the system processes specific inputs or requests that trigger the flawed code path, causing the operating system to crash or become unresponsive. From an operational standpoint, this vulnerability can result in complete service interruption for affected devices, potentially impacting business continuity and data availability for organizations relying on QNAP storage solutions.
The technical implementation of this vulnerability demonstrates a failure in defensive programming practices within the QNAP operating system codebase, where proper null checks are not performed before dereferencing pointers. This type of vulnerability is particularly dangerous because it can be triggered through legitimate network traffic and does not require complex exploitation techniques or specialized tools. The attack vector allows for remote execution of the denial-of-service condition, making it an attractive target for threat actors seeking to disrupt services. According to ATT&CK framework, this vulnerability maps to T1499.004 which covers network denial of service attacks, and represents a significant weakness in the system's resilience against operational disruptions. Organizations should immediately implement the vendor-provided patches to address this vulnerability and prevent potential exploitation by malicious actors.
The affected versions represent a broad range of QNAP operating system releases, indicating that this vulnerability has been present for an extended period and affects multiple product lines within the QNAP ecosystem. The patching timeline shows that the vulnerability was addressed in build 20251024 and subsequent releases, suggesting that organizations should upgrade to QTS 5.2.7.3297 build 20251024 or later for complete protection. This vulnerability highlights the importance of regular security updates and the need for organizations to maintain current system versions to protect against known exploits. The lack of authentication requirements for exploitation makes this vulnerability particularly concerning as it can be leveraged by any remote attacker without specialized access credentials. Security teams should prioritize patching activities to ensure all affected QNAP devices are updated to mitigate this denial-of-service risk.