Common Weakness Enumeration
CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6733 vulnerabilities reference this CWE, most recent first.
CVE-2026-76649 (GCVE-0-2026-76649)
Vulnerability from cvelistv5 – Published: 2026-08-28 20:18 – Updated: 2026-08-31 18:37
VLAI
EPSS
VEX
Title
Pre-Authentication NULL Pointer Dereference in UPnP SOAP Action Request Processing in TP-Link TL-WR841N
Summary
A NULL
pointer dereference vulnerability exists in TL-WR841N v14 in the UPnP service when processing SOAP action requests. A specially crafted SOAP action request containing unexpected XML content may cause the UPnP daemon to terminate unexpectedly.
Successful exploitation may result in a denial-of-service condition affecting UPnP functionality until the service is restarted or the device is rebooted.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:37 UTC
CWE
- CWE-476 - NULL pointer dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.tp-link.com/us/support/download/tl-wr… | patch |
| https://www.tp-link.com/en/support/download/tl-wr… | patch |
| https://www.tp-link.com/us/support/faq/5270/ | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TP-Link System Inc. | TL-WR841N v14 |
Affected:
0 , < TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478
(custom)
Affected: 0 , < TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588 (custom) |
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CVE-2026-76192 (GCVE-0-2026-76192)
Vulnerability from cvelistv5 – Published: 2026-09-22 18:33 – Updated: 2026-09-22 19:07
VLAI
EPSS
VEX
Title
InDesign Desktop | NULL Pointer Dereference (CWE-476)
Summary
InDesign Desktop is affected by a NULL Pointer Dereference vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 19:07 UTC
CWE
- CWE-476 - NULL Pointer Dereference (CWE-476)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/indesig… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | InDesign Desktop |
Affected:
0 , ≤ 21.5
(semver)
Unaffected: 21.6 (semver) |
|
| Adobe | InDesign Desktop |
Affected:
0 , ≤ 20.5.4
(semver)
Unaffected: 20.5.5 (semver) |
Date Public
2026-09-22 17:00
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CVE-2026-76166 (GCVE-0-2026-76166)
Vulnerability from cvelistv5 – Published: 2026-08-19 10:01 – Updated: 2026-08-20 15:23
VLAI
EPSS
VEX
Title
Modcluster-core: mod_cluster advertise listener: unauthenticated dos via crafted multicast datagram
Summary
A flaw was found in mod_cluster's AdvertiseListenerImpl (org.jboss.modcluster core module). A single crafted UDP multicast datagram with a valid HTTP status line and a "Server:" header but without the "Date:", "Digest:", and "Sequence:" headers triggers a NullPointerException in verifyDigest() that is not caught by the worker thread's exception handler. This causes the advertise listener thread to terminate permanently. The failure is silent (isListening() continues to return true) and persists until the node is restarted. The crash occurs before the AdvertiseSecurityKey comparison, so deployments with a configured security key are still affected.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 14:19 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-76166 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2510883 | issue-trackingx_refsource_REDHAT |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat JBoss Web Server 5 |
cpe:/a:redhat:jboss_enterprise_web_server:5
|
|
| Red Hat | Red Hat JBoss Web Server 6 |
cpe:/a:redhat:jboss_enterprise_web_server:6
|
|
| Red Hat | Red Hat JBoss Web Server 7 |
cpe:/a:redhat:jboss_enterprise_web_server:7
|
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
Date Public
2026-08-04 00:00
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CVE-2026-76014 (GCVE-0-2026-76014)
Vulnerability from cvelistv5 – Published: 2026-08-19 02:45 – Updated: 2026-08-25 01:49 X_Open Source
VLAI
EPSS
VEX
Title
BusyBox FEATURE_WGET_TIMEOUT wget.c null pointer dereference
Summary
A vulnerability has been found in BusyBox up to 1.30.1. This vulnerability affects unknown code of the file networking/wget.c of the component FEATURE_WGET_TIMEOUT Handler. Such manipulation of the argument -T leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The name of the patch is 83a40bf7a93c8ac093d33ab452222dd5b9eb57ff. A patch should be applied to remediate this issue.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 01:49 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/391923 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/391923/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-76014 | third-party-advisory |
| https://vuldb.com/submit/878212 | third-party-advisory |
| https://github.com/mirror/busybox/issues/124 | issue-tracking |
| https://gist.github.com/wyxstarry/5c199ec824928c5… | exploit |
| https://github.com/mirror/busybox/commit/83a40bf7… | patch |
Impacted products
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CVE-2026-75805 (GCVE-0-2026-75805)
Vulnerability from cvelistv5 – Published: 2026-09-29 15:32 – Updated: 2026-09-29 16:54
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in CMP Client Revocation Response Handling
Summary
Issue summary: A CMP client that requests certificate revocation on the basis
of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when
processing a crafted revocation response.
Impact summary: The NULL pointer dereference happens on a read which
leads to a crash and a Denial of Service for the affected client application.
CWE: CWE-476: NULL-pointer dereference
Description: A CMP client revoking a certificate has to tell the server which
certificate to revoke, and may do so by supplying a PKCS#10 CSR instead of the
certificate itself or its issuer name and serial number. This is
'openssl cmp -cmd rr -csr <file>' on the command line, or
OSSL_CMP_exec_RR_ses() with the certificate supplied via
OSSL_CMP_CTX_set1_p10CSR() through the API.
A CSR does not contain the issuer name and serial number of the certificate,
so the client does not send them. A server may optionally name the
certificate it revoked in its response, and the client then compares that
name against what it sent. Having sent neither an issuer name nor a serial
number, it has nothing to compare against, and a server returning a specially
crafted name causes the client to read from a NULL pointer and crash.
The revocation response is checked for valid message protection before
the affected code is reached, so an attacker must be a malicious or
compromised CMP server, or a man-in-the-middle in possession of the
secret used for message protection. Clients that identify the certificate
to be revoked by a certificate or by issuer and serial number rather
than by a PKCS#10 CSR are not affected.
FIPS impact: no
No FIPS modules are affected by this issue, as the CMP protocol
implementation is outside the OpenSSL FIPS module boundary.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 16:54 UTC
CWE
- CWE-476 - NULL-pointer dereference
Assigner
References
5 references
Impacted products
Date Public
2026-09-29 14:21
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CVE-2026-75618 (GCVE-0-2026-75618)
Vulnerability from cvelistv5 – Published: 2026-08-19 18:30 – Updated: 2026-08-27 23:12
VLAI
EPSS
VEX
Title
RTSP Null Pointer Dereference Denial-of-Service Vulnerability on TP-Link Tapo C100 and C101
Summary
Tapo C100/C101 V5 contains a null pointer dereference vulnerability in the RTSP service. An attacker on the local network can send specially crafted requests that cause the service to dereference an invalid pointer, resulting in a service crash and device reboot. Successful exploitation can disrupt live video streaming functionality and cause a temporary denial-of-service condition.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 19:32 UTC
CWE
- CWE-476 - NULL pointer dereference
Assigner
References
4 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| TP-Link Systems Inc. | Tapo C100 v5 |
Affected:
0 , < 1.5.4 Build 260528 Rel.11462n
(custom)
|
|
| TP-Link Systems Inc. | Tapo C101 v5 |
Affected:
0 , < 1.5.4 Build 260528 Rel.11462n
(custom)
|
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CVE-2026-75125 (GCVE-0-2026-75125)
Vulnerability from cvelistv5 – Published: 2026-08-28 15:32 – Updated: 2026-09-01 20:28
VLAI
EPSS
VEX
Title
PLANET GS-4210-16P2S V3 Null Pointer Dereference DoS via dispatcher.cgi web_poe_alive_rmtip_post
Summary
PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains an authenticated null pointer dereference vulnerability in /cgi-bin/dispatcher.cgi. The web_poe_alive_rmtip_post handler dereferences the rmtIP parameter without verifying its presence. A remote authenticated attacker can send a crafted request omitting the rmtIP parameter to cause the CGI process to dereference a null pointer and crash, resulting in denial of service of the web management interface.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 20:26 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.planet.com.tw/en/support/security-adv… | vendor-advisorypatch |
| https://www.vulncheck.com/advisories/planet-gs-42… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| PLANET Technology Corp. | PLANET GS-4210-16P2S V3 |
Affected:
0 , < 3.441b260626
(custom)
|
Date Public
2026-08-27 00:00
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CVE-2026-75013 (GCVE-0-2026-75013)
Vulnerability from cvelistv5 – Published: 2026-08-17 19:30 – Updated: 2026-08-18 14:54
VLAI
EPSS
VEX
Title
TOTOLINK EX1200L cstecgi.cgi setWizardCfg null pointer dereference
Summary
A vulnerability was detected in TOTOLINK EX1200L 9.3.5u.6146_B20201023. This affects the function setWizardCfg of the file /cgi-bin/cstecgi.cgi. The manipulation results in null pointer dereference. The attack can be launched remotely. The exploit is now public and may be used.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 14:54 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/391273 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/391273/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-75013 | third-party-advisory |
| https://vuldb.com/submit/876033 | third-party-advisory |
| https://gist.github.com/wyxstarry/21e6c2853891a3b… | exploit |
| https://www.totolink.net/ | product |
Impacted products
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CVE-2026-75012 (GCVE-0-2026-75012)
Vulnerability from cvelistv5 – Published: 2026-08-17 19:15 – Updated: 2026-08-18 12:31
VLAI
EPSS
VEX
Title
TOTOLINK EX1200L Password Configuration cstecgi.cgi setPasswordCfg null pointer dereference
Summary
A security vulnerability has been detected in TOTOLINK EX1200L 9.3.5u.6146_B20201023. Affected by this issue is the function setPasswordCfg of the file /cgi-bin/cstecgi.cgi of the component Password Configuration Handler. The manipulation leads to null pointer dereference. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 12:30 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/391272 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/391272/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-75012 | third-party-advisory |
| https://vuldb.com/submit/876022 | third-party-advisory |
| https://gist.github.com/wyxstarry/afdc067090575c2… | exploit |
| https://www.totolink.net/ | product |
Impacted products
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CVE-2026-73547 (GCVE-0-2026-73547)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:47 – Updated: 2026-09-22 15:39
VLAI
EPSS
VEX
Title
Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's ext_authz filter assumes that a request contains a :path pseudoheader when applying query_parameters_to_set or query_parameters_to_remove from an authorization response. A path-less CONNECT request makes request_headers_->Path() return null, and Filter::onComplete dereferences that pointer while parsing the query string. An unauthenticated downstream client can crash the Envoy process when the filter and authorization response use query-parameter mutation. The relevant scope boundary is that the deployment must accept path-less CONNECT and configure ext_authz query-parameter mutation. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 14:15 UTC
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/064af2… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/5f3b8e… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/838f8f… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/commit/c3170d… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
| https://github.com/envoyproxy/envoy/releases/tag/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
< 1.36.10
Affected: >= 1.37.0, < 1.37.6 Affected: >= 1.38.0, < 1.38.4 Affected: >= 1.39.0, < 1.39.1 |
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"timestamp": "2026-09-22T14:15:38.926679Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-22T15:39:45.625Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "envoy",
"vendor": "envoyproxy",
"versions": [
{
"status": "affected",
"version": "\u003c 1.36.10"
},
{
"status": "affected",
"version": "\u003e= 1.37.0, \u003c 1.37.6"
},
{
"status": "affected",
"version": "\u003e= 1.38.0, \u003c 1.38.4"
},
{
"status": "affected",
"version": "\u003e= 1.39.0, \u003c 1.39.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy\u0027s ext_authz filter assumes that a request contains a :path pseudoheader when applying query_parameters_to_set or query_parameters_to_remove from an authorization response. A path-less CONNECT request makes request_headers_-\u003ePath() return null, and Filter::onComplete dereferences that pointer while parsing the query string. An unauthenticated downstream client can crash the Envoy process when the filter and authorization response use query-parameter mutation. The relevant scope boundary is that the deployment must accept path-less CONNECT and configure ext_authz query-parameter mutation. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-21T19:47:54.720Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-87ph-jqwm-pg6r",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-87ph-jqwm-pg6r"
},
{
"name": "https://github.com/envoyproxy/envoy/commit/064af2e61d0d1c421490d9e3e6e643c5d117ffe4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/064af2e61d0d1c421490d9e3e6e643c5d117ffe4"
},
{
"name": "https://github.com/envoyproxy/envoy/commit/5f3b8e9b2b8a787a63202d35bb38820f3e9271fe",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/5f3b8e9b2b8a787a63202d35bb38820f3e9271fe"
},
{
"name": "https://github.com/envoyproxy/envoy/commit/838f8ffd9d7b5217682a22ee33470d4c7afb7e98",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/838f8ffd9d7b5217682a22ee33470d4c7afb7e98"
},
{
"name": "https://github.com/envoyproxy/envoy/commit/c3170d7c747e51bb8254378ea89afc03d3e71929",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/c3170d7c747e51bb8254378ea89afc03d3e71929"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
}
],
"source": {
"advisory": "GHSA-87ph-jqwm-pg6r",
"discovery": "UNKNOWN"
},
"title": "Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-73547",
"datePublished": "2026-09-21T19:47:54.720Z",
"dateReserved": "2026-08-12T20:53:46.379Z",
"dateUpdated": "2026-09-22T15:39:45.625Z",
"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.