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.

6959 vulnerabilities reference this CWE, most recent first.

CVE-2026-24805 (GCVE-0-2026-24805)

Vulnerability from cvelistv5 – Published: 2026-01-27 08:41 – Updated: 2026-01-27 20:47
VLAI
Title
Mishandles certain out-of-memory conditions in visualfc/liteide via liteidex/src/3rdparty/libvterm/src module
Summary
NULL Pointer Dereference vulnerability in visualfc liteide (liteidex/src/3rdparty/libvterm/src modules). This vulnerability is associated with program files screen.C, state.C, vterm.C. This issue affects liteide: before x38.4.
Severity
6.7 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/S:N/AU:N/R:U/V:D/RE:L/U:Amber
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-27 20:47 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
GovTech CSG CNA
CNA scorecard – unranked: 0 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version
visualfc liteide Affected: 0 , < x38.4 (git)
Create a notification for this product.
Credits
TITAN Team (titancaproject@gmail.com)
Show details on NVD website
To clipboard 

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CVE-2026-24723 (GCVE-0-2026-24723)

Vulnerability from cvelistv5 – Published: 2026-10-15 06:59 – Updated: 2026-10-15 14:50
VLAI
Title
NULL Pointer Dereference in utilRequest.cgi
Summary
A NULL pointer dereference vulnerability has been reported to affect File Station 5. 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 5.5.6.5243 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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 14:49 UTC
CWE
Assigner
qnap CNA under the mitre root
CNA scorecard B 85/100 over 61 records in the last 180 days details
References
Impacted products
Vendor Product Version
QNAP Systems Inc. File Station 5 Affected: 5.5.x , < 5.5.6.5243 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2026-24722 (GCVE-0-2026-24722)

Vulnerability from cvelistv5 – Published: 2026-10-15 06:59 – Updated: 2026-10-15 14:51
VLAI
Title
Null Pointer Dereference in File Station 5
Summary
A NULL pointer dereference vulnerability has been reported to affect File Station 5. 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 5.5.6.5243 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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 14:51 UTC
CWE
Assigner
qnap CNA under the mitre root
CNA scorecard B 85/100 over 61 records in the last 180 days details
References
Impacted products
Vendor Product Version
QNAP Systems Inc. File Station 5 Affected: 5.5.x , < 5.5.6.5243 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2026-24721 (GCVE-0-2026-24721)

Vulnerability from cvelistv5 – Published: 2026-10-15 06:59 – Updated: 2026-10-15 14:51
VLAI
Title
Null Pointer Dereference in File Station 5
Summary
A NULL pointer dereference vulnerability has been reported to affect File Station 5. 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 5.5.6.5243 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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 14:51 UTC
CWE
Assigner
qnap CNA under the mitre root
CNA scorecard B 85/100 over 61 records in the last 180 days details
References
Impacted products
Vendor Product Version
QNAP Systems Inc. File Station 5 Affected: 5.5.x , < 5.5.6.5243 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2026-24716 (GCVE-0-2026-24716)

Vulnerability from cvelistv5 – Published: 2026-06-10 03:08 – Updated: 2026-06-30 01:46
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 5.2.9.3492 build 20260507 and later QuTS hero h5.2.9.3499 build 20260514 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3459 build 20260409 and later
Severity
1.2 (Low)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 15:42 UTC
CWE
Assigner
qnap CNA under the mitre root
CNA scorecard B 85/100 over 61 records in the last 180 days details
References
Impacted products
Vendor Product Version
QNAP Systems Inc. QTS Affected: 5.2.0 , < 5.2.9.3492 build 20260507 (custom)
Create a notification for this product.
QNAP Systems Inc. QuTS hero Affected: h5.2.0 , < h5.2.9.3499 build 20260514 (custom)
Affected: h5.3.0 , < h5.3.4.3500 build 20260520 (custom)
Affected: ? , < h6.0.0.3459 build 20260409 (custom)
Create a notification for this product.
Credits
coral
Show details on NVD website
To clipboard 

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CVE-2026-24641 (GCVE-0-2026-24641)

Vulnerability from cvelistv5 – Published: 2026-03-10 16:44 – Updated: 2026-03-12 14:27
VLAI
Summary
A NULL Pointer Dereference vulnerability [CWE-476] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow an authenticated attacker to crash the HTTP daemon via crafted HTTP requests.
Severity
2.5 (Low)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-12 14:27 UTC
CWE
Assigner
fortinet CNA under the mitre root
CNA scorecard C 72/100 over 56 records in the last 180 days details
References
Impacted products
Vendor Product Version
Fortinet FortiWeb Affected: 8.0.0 , ≤ 8.0.2 (semver)
Affected: 7.6.0 , ≤ 7.6.6 (semver)
Affected: 7.4.0 , ≤ 7.4.12 (semver)
Affected: 7.2.0 , ≤ 7.2.12 (semver)
Affected: 7.0.0 , ≤ 7.0.12 (semver)
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    cpe:2.3:a:fortinet:fortiweb:7.0.0:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-24515 (GCVE-0-2026-24515)

Vulnerability from cvelistv5 – Published: 2026-01-23 07:46 – Updated: 2026-06-02 13:01
VLAI
Summary
In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.
Severity
2.9 (Low)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-23 15:31 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2325 records in the last 180 days details
References
Impacted products
Vendor Product Version
libexpat project libexpat Affected: 0 , < 2.7.4 (semver)
    cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
Create a notification for this product.
Siemens RUGGEDCOM RST2428P Affected: 0 , < V4.0 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-24411 (GCVE-0-2026-24411)

Vulnerability from cvelistv5 – Published: 2026-01-24 01:16 – Updated: 2026-01-26 16:17
VLAI
Title
iccDEV has Undefined Behavior and Null Pointer Deference in CIccTagXmlSegmentedCurve::ToXml()
Summary
iccDEV provides libraries and tools for interacting with, manipulating, and applying ICC color management profiles. Versions 2.3.1.1 and below have Undefined Behavior in CIccTagXmlSegmentedCurve::ToXml(). This occurs when user-controllable input is unsafely incorporated into ICC profile data or other structured binary blobs. Successful exploitation may allow an attacker to perform DoS, manipulate data, bypass application logic and Code Execution. This issue has been fixed in version 2.3.1.2.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-26 16:14 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-476 - NULL Pointer Dereference
  • CWE-690 - Unchecked Return Value to NULL Pointer Dereference
  • CWE-758 - Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7660 records in the last 180 days details
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-24410 (GCVE-0-2026-24410)

Vulnerability from cvelistv5 – Published: 2026-01-24 01:12 – Updated: 2026-01-26 16:17
VLAI
Title
iccDEV has Undefined Behavior and Null Pointer Deference in CIccProfileXml::ParseBasic()
Summary
iccDEV provides libraries and tools for interacting with, manipulating, and applying ICC color management profiles. Versions 2.3.1.1 and below have Undefined Behavior and Null Pointer Deference in CIccProfileXml::ParseBasic(). This occurs when user-controllable input is unsafely incorporated into ICC profile data or other structured binary blobs. Successful exploitation may allow an attacker to perform DoS, manipulate data, bypass application logic and Code Execution. This issue has been fixed in version 2.3.1.2.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-26 16:14 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-476 - NULL Pointer Dereference
  • CWE-690 - Unchecked Return Value to NULL Pointer Dereference
  • CWE-758 - Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7660 records in the last 180 days details
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-24409 (GCVE-0-2026-24409)

Vulnerability from cvelistv5 – Published: 2026-01-24 01:09 – Updated: 2026-01-26 17:10
VLAI
Title
iccDEV has Undefined Behavior and Null Pointer Deference in CIccTagXmlFloatNum<>::ParseXml()
Summary
iccDEV provides libraries and tools for interacting with, manipulating, and applying ICC color management profiles. Versions 2.3.1.1 and below have Undefined Behavior and Null Pointer Deference in CIccTagXmlFloatNum<>::ParseXml(). This occurs when user-controllable input is unsafely incorporated into ICC profile data or other structured binary blobs. Successful exploitation may allow an attacker to perform DoS, manipulate data, bypass application logic and Code Execution. This issue has been fixed in version 2.3.1.2.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-26 17:09 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-476 - NULL Pointer Dereference
  • CWE-690 - Unchecked Return Value to NULL Pointer Dereference
  • CWE-758 - Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7660 records in the last 180 days details
References
Impacted products
Show details on NVD website
To clipboard 

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              "content": {
                "id": "CVE-2026-24409",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-26T17:09:46.745125Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-26T17:10:09.299Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "iccDEV",
          "vendor": "InternationalColorConsortium",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.3.1.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "iccDEV provides libraries and tools for interacting with, manipulating, and applying ICC color management profiles. Versions 2.3.1.1 and below have Undefined Behavior and Null Pointer Deference in CIccTagXmlFloatNum\u003c\u003e::ParseXml(). This occurs when user-controllable input is unsafely incorporated into ICC profile data or other structured binary blobs. Successful exploitation may allow an attacker to perform DoS, manipulate data, bypass application logic and Code Execution. This issue has been fixed in version 2.3.1.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-690",
              "description": "CWE-690: Unchecked Return Value to NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-758",
              "description": "CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-24T01:09:52.644Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-398v-jvcg-p8f3",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-398v-jvcg-p8f3"
        },
        {
          "name": "https://github.com/InternationalColorConsortium/iccDEV/issues/484",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/InternationalColorConsortium/iccDEV/issues/484"
        },
        {
          "name": "https://github.com/InternationalColorConsortium/iccDEV/commit/9f134c44895edd2edca4bcb97e15c0ba9aa77382",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/InternationalColorConsortium/iccDEV/commit/9f134c44895edd2edca4bcb97e15c0ba9aa77382"
        }
      ],
      "source": {
        "advisory": "GHSA-398v-jvcg-p8f3",
        "discovery": "UNKNOWN"
      },
      "title": "iccDEV has Undefined Behavior and Null Pointer Deference in CIccTagXmlFloatNum\u003c\u003e::ParseXml()"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-24409",
    "datePublished": "2026-01-24T01:09:52.644Z",
    "dateReserved": "2026-01-22T18:19:49.174Z",
    "dateUpdated": "2026-01-26T17:10:09.299Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
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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