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.
6541 vulnerabilities reference this CWE, most recent first.
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-2026-75618 (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: 2026-08-28 20:26
VLAI
EPSS
VEX
Title
PLANET GS-4210-16P2S Null Pointer Dereference DoS via dispatcher.cgi web_poe_alive_rmtip_post
Summary
PLANET GS-4210-16P2S 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 |
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-2026-73502 (GCVE-0-2026-73502)
Vulnerability from cvelistv5 – Published: 2026-08-18 17:58 – Updated: 2026-08-18 18:42
VLAI
EPSS
VEX
Title
kin-openapi openapi3filter: unauthenticated nil-pointer panic when validating a request against a `content` parameter whose media type has no schema
Summary
kin-openapi is a Go project for handling OpenAPI files. From 0.2.0 until 0.144.0, openapi3filter.ValidateRequest can encounter a NULL-pointer-dereference denial of service when an operation declares a content parameter whose application/json media type has no schema. In openapi3filter/req_resp_decoder.go, the default defaultContentParameterDecoder dereferences mt.Schema.Value without checking whether mt.Schema is nil, even though doc.Validate() accepts the document under OpenAPI 3.0.x and 3.1.x. A single unauthenticated request supplying the parameter value can panic request validation, causing an aborted request with log growth in the common synchronous net/http path or a full process crash in integrations without recovery. This issue is fixed in version 0.144.0.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 18:42 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/getkin/kin-openapi/security/ad… | x_refsource_CONFIRM |
| https://github.com/getkin/kin-openapi/commit/68ac… | x_refsource_MISC |
| https://github.com/getkin/kin-openapi/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| getkin | kin-openapi |
Affected:
>= 0.2.0, < 0.144.0
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CVE-2026-73199 (GCVE-0-2026-73199)
Vulnerability from cvelistv5 – Published: 2026-08-20 10:39 – Updated: 2026-08-20 13:50
VLAI
EPSS
VEX
Title
Ipa: freeipa: null pointer dereference in `ipa-enrollment` extended operation (`join_oid`) via missing request value
Summary
A flaw was found in the `ipa-enrollment` SLAPI plugin. A remote authenticated client can exploit a null pointer dereference vulnerability by sending a malformed Lightweight Directory Access Protocol (LDAP) extended operation. By omitting the request value for the `JOIN_OID` in the `ipa-enrollment` extended operation, an attacker can trigger a server crash, potentially causing a denial of service.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 13:50 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-73199 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2471741 | issue-trackingx_refsource_REDHAT |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
Date Public
2026-08-20 10:16
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CVE-2026-72582 (GCVE-0-2026-72582)
Vulnerability from cvelistv5 – Published: 2026-08-10 10:41 – Updated: 2026-08-10 13:17
VLAI
EPSS
VEX
Title
fastschema - Unauthenticated NULL Pointer Dereference DoS in Account Recovery Endpoint
Summary
A NULL pointer dereference vulnerability in fastschema through v0.15.1 allows an unauthenticated remote attacker to crash the server process with a single HTTP request. The sendOTPEmail function in pkg/auth/local.go dereferences a pointer obtained from an unchecked error path without validating it is non-nil, causing a fatal panic that terminates the entire server when a recovery request is sent to the /api/auth/local/recover endpoint.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 13:17 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/fastschema/fastschema | third-party-advisory |
| https://github.com/fastschema/fastschema/blob/mai… | technical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| fastschema | fastschema |
Affected:
0 , ≤ 0.15.1
(semver)
|
Date Public
2026-08-10 10:32
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CVE-2026-71967 (GCVE-0-2026-71967)
Vulnerability from cvelistv5 – Published: 2026-08-10 18:11 – Updated: 2026-08-14 16:51 X_Open Source
VLAI
EPSS
VEX
Title
OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session
Summary
OP-TEE OS through 4.10.0, fixed in commit 0aadfc2, contains a null pointer dereference vulnerability in the Widevine pseudo-TA open_session handler that allows Normal World clients to cause a denial of service when CFG_WIDEVINE_PTA is enabled. Attackers can open a session directly on the Widevine PTA to trigger an unconditional dereference of a NULL calling session pointer via is_user_ta_ctx(), faulting the TEE at S-EL1 and crashing the trusted execution environment.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 18:58 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/OP-TEE/optee_os/pull/7899 | issue-tracking |
| https://github.com/OP-TEE/optee_os/commit/0aadfc2… | patch |
| https://www.vulncheck.com/advisories/op-tee-os-nu… | third-party-advisory |
Impacted products
Date Public
2026-07-30 00:00
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"url": "https://github.com/OP-TEE/optee_os/commit/0aadfc23407f50e770eb5ddd871fc208f5626833"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/op-tee-os-null-pointer-dereference-dos-via-widevine-pta-open-session"
}
],
"source": {
"discovery": "UNKNOWN"
},
"tags": [
"x_open-source"
],
"title": "OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session",
"x_generator": {
"engine": "vulncheck"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-71967",
"datePublished": "2026-08-10T18:11:01.124Z",
"dateReserved": "2026-08-08T16:43:04.178Z",
"dateUpdated": "2026-08-14T16:51:53.677Z",
"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.