QTS: NULL Pointer Dereference
CVE-2025-62850 is a high-severity NULL pointer dereference vulnerability in QTS from QNAP, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists version 5.2.9.3410 build 20260214 as the first without the flaw, so updating QTS to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.44% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update QTS to 5.2.9.3410 build 20260214 or a later version.
- Update QVP to 2.7.4 or a later version.
- Update QuTS cloud to c5.2.9.3468 build 20260413 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| QNAP | QTS | 5.2.x up to, but not including, 5.2.9.3410 build 20260214 | 5.2.9.3410 build 20260214 |
| QNAP | QVP | 2.7.x up to, but not including, 2.7.4 | 2.7.4 |
| QNAP | QuTS cloud | c5.2.x up to, but not including, c5.2.9.3468 build 20260413 | c5.2.9.3468 build 20260413 |
| QNAP | QuTS hero | h5.2.x up to, but not including, h5.2.9.3410 build 20260214; h5.3.x up to, but not including, h5.3.4.3500 build 20260520; h6.0.x up to, but not including, h6.0.0.3459 build 20260409 | h5.2.9.3410 build 20260214, h5.3.4.3500 build 20260520, h6.0.0.3459 build 20260409 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 5.1 | Medium | CNA (qnapsecurity.com.tw) |
| CVSS 3.1 | 7.2 | High | NVD |
Official description
A NULL pointer dereference vulnerability has been reported to affect QTS, QVP, QuTS cloud and QuTS hero. 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 version: QTS 5.2.9.3410 build 20260214 and later QVP 2.7.4 and later QuTS cloud c5.2.9.3468 build 20260413 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3459 build 20260409 and later
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
How developers prevent this class of flaw
- For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
- Select a programming language that is not susceptible to these issues.
- Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- qnap.com/en/release-notes/qts/5.2.9.3410/20260214
- qnap.com/en/release-notes/quts_hero/h5.2.9.3410/20260214
- qnap.com/en/release-notes/quts_hero/h5.3.4.3500/20260520
- qnap.com/en/release-notes/quts_hero/h6.0.0.3459/20260409
- qnap.com/en/release-notes/qutscloud/c5.2.9.3468/20260413
- qnap.com/en/release-notes/qvp/2.7.5.1691/20260818
Other vulnerabilities in QTS
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
- 7.2 High severity
Recent NULL Pointer Dereference vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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