Common Weakness Enumeration

CWE-476

Allowed

NULL Pointer Dereference

Abstraction: Base · Status: Stable

API response cwe.mitre.org

The product dereferences a pointer that it expects to be valid but is NULL.

6310 vulnerabilities reference this CWE, most recent first.

CVE-2025-48726 (GCVE-0-2025-48726)

Vulnerability from cvelistv5 – Published: 2025-10-03 18:10 – Updated: 2025-10-03 18:57
VLAI
Title
QTS, QuTS hero
Summary
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 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. QTS Affected: 5.2.x , < 5.2.6.3195 build 20250715 (custom)
Create a notification for this product.
QNAP Systems Inc. QuTS hero Affected: h5.2.x , < h5.2.6.3195 build 20250715 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-48722 (GCVE-0-2025-48722)

Vulnerability from cvelistv5 – Published: 2026-02-11 12:19 – Updated: 2026-02-11 14:38
VLAI
Title
Qsync Central
Summary
A NULL pointer dereference vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user 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: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later
Severity
1.3 (Low)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. Qsync Central Affected: 5.0.x.x , < 5.0.0.4 ( 2026/01/20 ) (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-48498 (GCVE-0-2025-48498)

Vulnerability from cvelistv5 – Published: 2025-07-22 15:26 – Updated: 2025-11-03 20:04
VLAI
Summary
A null pointer dereference vulnerability exists in the Distributed Transaction component of Bloomberg Comdb2 8.1 when processing a number of fields used for coordination. A specially crafted protocol buffer message can lead to a denial of service. An attacker can simply connect to a database instance over TCP and send the crafted message to trigger this vulnerability.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Bloomberg Comdb2 Affected: 8.1
Create a notification for this product.
Credits
Discovered by a member of Cisco Talos.
Show details on NVD website
To clipboard 

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CVE-2025-48073 (GCVE-0-2025-48073)

Vulnerability from cvelistv5 – Published: 2025-07-31 20:25 – Updated: 2025-07-31 20:36
VLAI
Title
OpenEXR ScanLineProcess::run_fill NULL Pointer Write In "reduceMemory" Mode
Summary
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In version 3.3.2, when reading a deep scanline image with a large sample count in reduceMemory mode, it is possible to crash a target application with a NULL pointer dereference in a write operation. This is fixed in version 3.3.3.
Severity
4.6 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
AcademySoftwareFoundation openexr Affected: >= 3.3.2, < 3.3.3
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-47214 (GCVE-0-2025-47214)

Vulnerability from cvelistv5 – Published: 2025-10-03 18:10 – Updated: 2025-10-03 18:57
VLAI
Title
QTS
Summary
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 5.2.6.3195 build 20250715 and later and later
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. QTS Affected: 5.2.x , < 5.2.6.3195 build 20250715 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-47213 (GCVE-0-2025-47213)

Vulnerability from cvelistv5 – Published: 2025-10-03 18:10 – Updated: 2025-10-03 18:56
VLAI
Title
QTS, QuTS hero
Summary
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 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. QTS Affected: 5.2.x , < 5.2.6.3195 build 20250715 (custom)
Create a notification for this product.
QNAP Systems Inc. QuTS hero Affected: h5.2.x , < h5.2.6.3195 build 20250715 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-47210 (GCVE-0-2025-47210)

Vulnerability from cvelistv5 – Published: 2025-10-03 18:09 – Updated: 2025-10-03 18:52
VLAI
Title
Qsync Central
Summary
A NULL pointer dereference vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user 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: Qsync Central 5.0.0.2 ( 2025/07/31 ) and later
Severity
5.3 (Medium)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. Qsync Central Affected: 5.0.0 , < 5.0.0.2 ( 2025/07/31 ) (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-47209 (GCVE-0-2025-47209)

Vulnerability from cvelistv5 – Published: 2026-02-11 12:19 – Updated: 2026-02-11 14:34
VLAI
Title
Qsync Central
Summary
A NULL pointer dereference vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user 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: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later
Severity
1.3 (Low)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. Qsync Central Affected: 5.0.x.x , < 5.0.0.4 ( 2026/01/20 ) (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-47207 (GCVE-0-2025-47207)

Vulnerability from cvelistv5 – Published: 2025-11-07 15:16 – Updated: 2025-11-07 15:56
VLAI
Title
File Station 5
Summary
A NULL pointer dereference vulnerability has been reported to affect several product versions. If a remote attacker gains a user 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: File Station 5 5.5.6.5018 and later
Severity
5.3 (Medium)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. File Station 5 Affected: 5.5.x , < 5.5.6.5018 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-47205 (GCVE-0-2025-47205)

Vulnerability from cvelistv5 – Published: 2026-02-11 12:19 – Updated: 2026-02-11 14:33
VLAI
Title
QTS, QuTS hero
Summary
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 5.2.8.3332 build 20251128 and later QuTS hero h5.2.8.3321 build 20251117 and later
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
QNAP Systems Inc. QTS Affected: 5.2.x , < 5.2.8.3332 build 20251128 (custom)
Create a notification for this product.
QNAP Systems Inc. QuTS hero Affected: h5.2.x , < h5.2.8.3321 build 20251117 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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Mitigation MIT-56
Implementation

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 [REF-1484].

Mitigation
Requirements

Select a programming language that is not susceptible to these issues.

Mitigation
Implementation

Check the results of all functions that return a value and verify that the value is non-null before acting upon it.

Mitigation
Architecture and Design

Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.

Mitigation
Implementation

Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.

No CAPEC attack patterns related to this CWE.

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