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-2025-54148 (GCVE-0-2025-54148)

Vulnerability from cvelistv5 – Published: 2026-02-11 12:18 – Updated: 2026-02-11 16:58
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-2025-54147 (GCVE-0-2025-54147)

Vulnerability from cvelistv5 – Published: 2026-02-11 12:18 – Updated: 2026-02-11 16:58
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-2025-54146 (GCVE-0-2025-54146)

Vulnerability from cvelistv5 – Published: 2026-02-11 12:18 – Updated: 2026-02-11 16:59
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-2025-53817 (GCVE-0-2025-53817)

Vulnerability from cvelistv5 – Published: 2025-07-17 18:12 – Updated: 2025-11-04 21:12
VLAI
Title
GHSL-2025-059 - 7-Zip - Null pointer array write attempt in NArchive::NCom::CHandler::GetStream
Summary
7-Zip is a file archiver with a high compression ratio. 7-Zip supports extracting from Compound Documents. Prior to version 25.0.0, a null pointer dereference in the Compound handler may lead to denial of service. Version 25.0.0 contains a fix cor the issue.
Severity
5.5 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
ipavlov 7-Zip Affected: < 25.0.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-53716 (GCVE-0-2025-53716)

Vulnerability from cvelistv5 – Published: 2025-08-12 17:10 – Updated: 2026-02-13 18:54
VLAI
Title
Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Summary
Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to deny service over a network.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.7678 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6216 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6216 (custom)
Create a notification for this product.
Microsoft Windows 11 version 22H2 Affected: 10.0.22621.0 , < 10.0.22621.5768 (custom)
Create a notification for this product.
Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.5768 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.5768 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.4946 (custom)
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Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.7678 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.7678 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4052 (custom)
Create a notification for this product.
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.1791 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.4946 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.4946 (custom)
Create a notification for this product.
Date Public
2025-08-12 07:00
Show details on NVD website
To clipboard 

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CVE-2025-53603 (GCVE-0-2025-53603)

Vulnerability from cvelistv5 – Published: 2025-07-05 00:00 – Updated: 2026-01-26 16:05
VLAI
Summary
In Alinto SOPE SOGo 2.0.2 through 5.12.2, sope-core/NGExtensions/NGHashMap.m allows a NULL pointer dereference and SOGo crash via a request in which a parameter in the query string is a duplicate of a parameter in the POST body.
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
Alinto SOPE Affected: SOGo 2.0.2 , ≤ 5.12.2 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-53598 (GCVE-0-2025-53598)

Vulnerability from cvelistv5 – Published: 2026-02-11 12:18 – Updated: 2026-02-11 16:59
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
0.6 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/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-2025-53596 (GCVE-0-2025-53596)

Vulnerability from cvelistv5 – Published: 2026-01-02 14:56 – Updated: 2026-01-05 20:38
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 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.1.3250 build 20250912 and later
Severity
1.2 (Low)
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/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. QTS Affected: 5.2.x , < 5.2.7.3256 build 20250913 (custom)
Create a notification for this product.
QNAP Systems Inc. QuTS hero Affected: h5.2.x , < h5.2.7.3256 build 20250913 (custom)
Affected: h5.3.x , < h5.3.1.3250 build 20250912 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-53592 (GCVE-0-2025-53592)

Vulnerability from cvelistv5 – Published: 2026-01-02 14:56 – Updated: 2026-01-05 20:39
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 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 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
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. QTS Affected: 5.2.x , < 5.2.7.3256 build 20250913 (custom)
Create a notification for this product.
QNAP Systems Inc. QuTS hero Affected: h5.2.x , < h5.2.7.3256 build 20250913 (custom)
Affected: h5.3.x , < h5.3.1.3250 build 20250912 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2025-53590 (GCVE-0-2025-53590)

Vulnerability from cvelistv5 – Published: 2026-01-02 14:55 – Updated: 2026-01-05 20:39
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 version: QTS 5.2.7.3256 build 20250913 and later
Severity
1.2 (Low)
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/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. QTS Affected: 5.2.x , < 5.2.7.3256 build 20250913 (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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