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.

6666 vulnerabilities reference this CWE, most recent first.

CVE-2026-77489 (GCVE-0-2026-77489)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:13 – Updated: 2026-09-21 16:01
VLAI
Title
Windows Biometric Service Elevation of Privilege Vulnerability
Summary
Null pointer dereference in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 18:55 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.9512 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.9245 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.7725 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.7725 (custom)
Create a notification for this product.
Microsoft Windows 11 version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7582 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7582 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.9445 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.9445 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2954 (custom)
Create a notification for this product.
Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.9512 (custom)
Create a notification for this product.
Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.9512 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.9245 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.9245 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5622 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.33438 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.33438 (custom)
Create a notification for this product.
Date Public
2026-09-08 14:00
Show details on NVD website
To clipboard 

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CVE-2026-77217 (GCVE-0-2026-77217)

Vulnerability from cvelistv5 – Published: 2026-08-28 15:34 – Updated: 2026-09-01 20:28
VLAI
Title
PLANET GS-4210-16P2S V3 Stack Buffer Overflow and NULL Pointer Dereference via dispatcher.cgi RADIUS Handlers
Summary
PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains authenticated stack buffer overflow and null pointer dereference vulnerabilities in /cgi-bin/dispatcher.cgi. The web_radiusSrv*_post family of handlers copies the radKey, radKey_0, radDftParamKey, radName, and radIp POST parameters into fixed-size stack buffers without length validation, and additionally dereferences radName and radIp without verifying their presence in the request. A remote authenticated attacker can send crafted requests to crash the CGI process or web management service, resulting in denial of service.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 16:23 UTC
CWE
  • CWE-121 - Stack-based Buffer Overflow
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
PLANET Technology Corp. PLANET GS-4210-16P2S V3 Affected: 0 , < 3.441b260626 (custom)
Create a notification for this product.
Date Public
2026-08-27 00:00
Credits
Jincheng Wang (@winmt) Professor Le Yu of Nanjing University of Posts and Telecommunications Professor Xiapu Luo of The Hong Kong Polytechnic University
Show details on NVD website
To clipboard 

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CVE-2026-76928 (GCVE-0-2026-76928)

Vulnerability from cvelistv5 – Published: 2026-08-19 23:00 – Updated: 2026-08-20 16:27
VLAI
Title
NULL Pointer Dereference in Wireshark
Summary
X.509IF protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
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: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 16:03 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Wireshark Foundation Wireshark Affected: 4.6.0 , < 4.6.8 (semver)
Affected: 4.4.0 , < 4.4.18 (semver)
Create a notification for this product.
Credits
Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)
Show details on NVD website
To clipboard 

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CVE-2026-76927 (GCVE-0-2026-76927)

Vulnerability from cvelistv5 – Published: 2026-08-19 23:00 – Updated: 2026-09-17 18:48
VLAI
Title
NULL Pointer Dereference in Wireshark
Summary
H.245 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:06 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Wireshark Foundation Wireshark Affected: 4.6.0 , < 4.6.8 (semver)
Affected: 4.4.0 , < 4.4.18 (semver)
Create a notification for this product.
Credits
Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)
Show details on NVD website
To clipboard 

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CVE-2026-76922 (GCVE-0-2026-76922)

Vulnerability from cvelistv5 – Published: 2026-08-19 22:45 – Updated: 2026-09-17 18:48
VLAI
Title
NULL Pointer Dereference in Wireshark
Summary
Bluetooth BR/EDR FHS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:07 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Wireshark Foundation Wireshark Affected: 4.6.0 , < 4.6.8 (semver)
Affected: 4.4.0 , < 4.4.18 (semver)
Create a notification for this product.
Credits
Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)
Show details on NVD website
To clipboard 

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CVE-2026-76905 (GCVE-0-2026-76905)

Vulnerability from cvelistv5 – Published: 2026-08-21 20:43 – Updated: 2026-08-25 14:21
VLAI
Title
kin-openapi openai3filter: nil-pointer panic in ConvertErrors on malformed multipart/form-data body enables unauthenticated DoS
Summary
kin-openapi is a Go project for handling OpenAPI files. From 0.10.0 until 0.141.0, openapi3filter.convertParseError in openapi3filter/validation_error_encoder.go dereferences e.Parameter.In without checking whether e.Parameter is nil. A malformed non-string scalar field in a multipart/form-data request body produces a nested ParseError with a nil RequestError.Parameter, and applications that render the validation error through openapi3filter.ConvertErrors or ValidationErrorEncoder panic. An unauthenticated client can repeatedly send such requests to deny service when the application lacks a recovery boundary. JSON request bodies and applications that do not use these error-rendering helpers are not affected. This issue is fixed in version 0.141.0.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:21 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
getkin kin-openapi Affected: >= 0.10.0, < 0.141.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-76881 (GCVE-0-2026-76881)

Vulnerability from cvelistv5 – Published: 2026-08-19 22:34 – Updated: 2026-08-20 15:00
VLAI
Title
NULL Pointer Dereference in Wireshark
Summary
CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:00 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Wireshark Foundation Wireshark Affected: 4.6.0 , < 4.6.8 (semver)
Affected: 4.4.0 , < 4.4.18 (semver)
Create a notification for this product.
Credits
Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)
Show details on NVD website
To clipboard 

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CVE-2026-76868 (GCVE-0-2026-76868)

Vulnerability from cvelistv5 – Published: 2026-09-15 21:57 – Updated: 2026-09-16 19:02
VLAI
Title
Netcore NR255-V 1.5.130703 NULL Pointer Dereference in route_policy_add.cgi via Missing exit_port
Summary
Netcore NR255-V version 1.5.130703 contains a null pointer dereference vulnerability in route_policy_add.cgi caused by a missing exit_port parameter. Attackers can send requests lacking the exit_port field to trigger the null pointer dereference, resulting in a denial of service.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 19:02 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Netcore NR255-V Affected: 1.5.130703 (custom)
Create a notification for this product.
Date Public
2026-09-04 00:00
Credits
Zhou Ao Yin Luxing Jiang Yuxuan Liu Xin @Nebusec
Show details on NVD website
To clipboard 

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CVE-2026-76865 (GCVE-0-2026-76865)

Vulnerability from cvelistv5 – Published: 2026-09-15 21:57 – Updated: 2026-09-16 19:31
VLAI
Title
Netcore NR255-V 1.5.130703 NULL Pointer Dereference via Unchecked atoi() in QoS Setter Handlers
Summary
Netcore NR255-V version 1.5.130703 contains a null pointer dereference vulnerability in the QoS setter CGI handlers filter_conn_del_cgi.c and gre_prio_set_cgi.c due to unchecked atoi() results. An attacker can trigger the flaw by supplying crafted input to these handlers, causing a denial of service.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 19:31 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Netcore NR255-V Affected: 1.5.130703 (custom)
Create a notification for this product.
Date Public
2026-09-04 00:00
Credits
Zhou Ao Yin Luxing Jiang Yuxuan Liu Xin @Nebusec
Show details on NVD website
To clipboard 

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CVE-2026-76781 (GCVE-0-2026-76781)

Vulnerability from cvelistv5 – Published: 2026-09-17 15:11 – Updated: 2026-09-21 20:03
VLAI
Title
Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute
Summary
A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 17:10 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Date Public
2026-08-19 00:00
Credits
Red Hat would like to thank Yirou Yang for reporting this issue.
Show details on NVD website
To clipboard 

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          "value": "Red Hat would like to thank Yirou Yang for reporting this issue."
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          "lang": "en",
          "value": "A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS)."
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            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
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              "description": "NULL Pointer Dereference",
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    "datePublished": "2026-09-17T15:11:29.256Z",
    "dateReserved": "2026-08-19T17:15:10.735Z",
    "dateUpdated": "2026-09-21T20:03:27.450Z",
    "state": "PUBLISHED"
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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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