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.
1661 vulnerabilities reference this CWE, most recent first.
CVE-2025-68141 (GCVE-0-2025-68141)
Vulnerability from cvelistv5 – Published: 2026-01-21 19:56 – Updated: 2026-01-22 16:50
VLAI
EPSS
VEX
Title
EVerest vulnerable to null pointer dereference during DC_ChargeLoopRes document deserialization
Summary
EVerest is an EV charging software stack. Prior to version 2025.10.0, during the deserialization of a `DC_ChargeLoopRes` message that includes Receipt as well as TaxCosts, the vector `<DetailedTax>tax_costs` in the target `Receipt` structure is accessed out of bounds. This occurs in the method `template <> void convert(const struct iso20_dc_DetailedTaxType& in, datatypes::DetailedTax& out)` which leads to a null pointer dereference and causes the module to terminate. The EVerest processes and all its modules shut down, affecting all EVSE. Version 2025.10.0 fixes the issue.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-22 15:09 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/EVerest/everest-core/security/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EVerest | everest-core |
Affected:
< 2025.10.0
|
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CVE-2025-66646 (GCVE-0-2025-66646)
Vulnerability from cvelistv5 – Published: 2025-12-17 19:18 – Updated: 2025-12-17 20:30
VLAI
EPSS
VEX
Title
RIOT-OS has NULL pointer dereference in gnrc_ipv6_ext_frag_reass
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-17 20:26 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M
CNA
References
10 references
| URL | Tags |
|---|---|
| https://github.com/RIOT-OS/RIOT/security/advisori… | x_refsource_CONFIRM |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
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| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/blob/eb65305cf9f1… | x_refsource_MISC |
| https://github.com/RIOT-OS/RIOT/releases/tag/2025.10 | x_refsource_MISC |
| https://github.com/user-attachments/files/2390399… | x_refsource_MISC |
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CVE-2025-66281 (GCVE-0-2025-66281)
Vulnerability from cvelistv5 – Published: 2026-06-10 03:06 – Updated: 2026-06-10 15:50
VLAI
EPSS
VEX
Title
QTS, QuTS hero
Summary
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following versions:
QTS 5.2.9.3410 build 20260214 and later
QuTS hero h5.2.9.3410 build 20260214 and later
QuTS hero h5.3.4.3500 build 20260520 and later
QuTS hero h6.0.0.3397 build 20260206 and later
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 15:49 UTC
CWE
Assigner
qnap
CNA
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | QTS |
Affected:
5.2.0 , < 5.2.9.3410 build 20260214
(custom)
|
|
| QNAP Systems Inc. | QuTS hero |
Affected:
h5.2.0 , < h5.2.9.3410 build 20260214
(custom)
Affected: h5.3.0 , < h5.3.4.3500 build 20260520 (custom) Affected: ? , < h6.0.0.3397 build 20260206 (custom) |
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CVE-2025-66274 (GCVE-0-2025-66274)
Vulnerability from cvelistv5 – Published: 2026-02-11 12:15 – Updated: 2026-06-09 06:17
VLAI
EPSS
VEX
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 5.2.9.3410 build 20260214 and later
QuTS hero h5.2.9.3410 build 20260214 and later
QuTS hero h5.3.2.3354 build 20251225 and later
QuTS hero h6.0.0.3397 build 20260206 and later
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-11 16:49 UTC
CWE
Assigner
qnap
CNA
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | QTS |
Affected:
5.2.0 , < 5.2.9.3410 build 20260214
(custom)
|
|
| QNAP Systems Inc. | QuTS hero |
Affected:
h5.2.0 , < h5.2.9.3410 build 20260214
(custom)
Affected: h5.3.0 , < h5.3.2.3354 build 20251225 (custom) Affected: ? , < h6.0.0.3397 build 20260206 (custom) |
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CVE-2025-64527 (GCVE-0-2025-64527)
Vulnerability from cvelistv5 – Published: 2025-12-03 18:04 – Updated: 2025-12-03 20:18
VLAI
EPSS
VEX
Title
Envoy crashes when JWT authentication is configured with the remote JWKS fetching
Summary
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy crashes when JWT authentication is configured with the remote JWKS fetching, allow_missing_or_failed is enabled, multiple JWT tokens are present in the request headers and the JWKS fetch fails. This is caused by a re-entry bug in the JwksFetcherImpl. When the first token's JWKS fetch fails, onJwksError() callback triggers processing of the second token, which calls fetch() again on the same fetcher object. The original callback's reset() then clears the second fetch's state (receiver_ and request_) which causes a crash when the async HTTP response arrives.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-03 20:18 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.36.0, <= 1.36.2
Affected: >= 1.35.0, <= 1.35.6 Affected: >= 1.34.0, <= 1.34.10 Affected: <= 1.33.12 |
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CVE-2025-64335 (GCVE-0-2025-64335)
Vulnerability from cvelistv5 – Published: 2025-11-26 22:39 – Updated: 2025-12-12 15:13
VLAI
EPSS
VEX
Title
Suricata is vulnerable to a null deref when used with base64_data
Summary
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-28 16:30 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
GitHub_M
CNA
References
4 references
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CVE-2025-64169 (GCVE-0-2025-64169)
Vulnerability from cvelistv5 – Published: 2025-11-21 18:39 – Updated: 2025-11-21 19:05
VLAI
EPSS
VEX
Title
Wazuh NULL pointer dereference in fim_alert line 666
Summary
Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 3.7.0 to before 4.12.0, fim_alert() implementation does not check whether oldsum->md5 is NULL or not before dereferencing it. A compromised agent can cause a crash of analysisd by sending a specially crafted message to the wazuh manager. This issue has been patched in version 4.12.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-21 19:05 UTC
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
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CVE-2025-62850 (GCVE-0-2025-62850)
Vulnerability from cvelistv5 – Published: 2026-06-10 02:34 – Updated: 2026-10-15 07:55
VLAI
EPSS
VEX
Title
NULL Pointer Dereference in networkRequest.cgi
Summary
A NULL pointer dereference vulnerability has been reported to affect QTS, QVP, QuTS cloud and QuTS hero. 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 5.2.9.3410 build 20260214 and later
QVP 2.7.4 and later
QuTS cloud c5.2.9.3468 build 20260413 and later
QuTS hero h5.2.9.3410 build 20260214 and later
QuTS hero h5.3.4.3500 build 20260520 and later
QuTS hero h6.0.0.3459 build 20260409 and later
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 15:57 UTC
CWE
Assigner
qnap
CNA
References
6 references
| URL | Tags |
|---|---|
| https://www.qnap.com/en/release-notes/qts/5.2.9.3… | release-notes |
| https://www.qnap.com/en/release-notes/qvp/2.7.5.1… | release-notes |
| https://www.qnap.com/en/release-notes/qutscloud/c… | release-notes |
| https://www.qnap.com/en/release-notes/quts_hero/h… | release-notes |
| https://www.qnap.com/en/release-notes/quts_hero/h… | release-notes |
| https://www.qnap.com/en/release-notes/quts_hero/h… | release-notes |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | QTS |
Affected:
5.2.x , < 5.2.9.3410 build 20260214
(custom)
|
|
| QNAP Systems Inc. | QVP |
Affected:
2.7.x , < 2.7.4
(custom)
|
|
| QNAP Systems Inc. | QuTS cloud |
Affected:
c5.2.x , < c5.2.9.3468 build 20260413
(custom)
|
|
| QNAP Systems Inc. | QuTS hero |
Affected:
h5.2.x , < h5.2.9.3410 build 20260214
(custom)
Affected: h5.3.x , < h5.3.4.3500 build 20260520 (custom) Affected: h6.0.x , < h6.0.0.3459 build 20260409 (custom) |
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CVE-2025-62848 (GCVE-0-2025-62848)
Vulnerability from cvelistv5 – Published: 2025-12-16 02:25 – Updated: 2026-11-03 22:03
VLAI
EPSS
VEX
Title
QTS, QuTS hero
Summary
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following versions:
QTS 5.2.7.3297 build 20251024 and later
QuTS hero h5.2.7.3297 build 20251024 and later
QuTS hero h5.3.1.3292 build 20251024 and later
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-18 03:55 UTC
CWE
Assigner
qnap
CNA
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| QNAP Systems Inc. | QTS |
Affected:
5.2.x , < 5.2.7.3297 build 20251024
(custom)
cpe:2.3:a:qnap_systems_inc.:qts:*:*:*:*:*:*:*:* |
|
| QNAP Systems Inc. | QuTS hero |
Affected:
h5.2.x , < h5.2.7.3297 build 20251024
(custom)
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CVE-2025-62791 (GCVE-0-2025-62791)
Vulnerability from cvelistv5 – Published: 2025-10-29 16:48 – Updated: 2025-10-29 19:03
VLAI
EPSS
VEX
Title
Wazuh vulnerable to NULL pointer dereference in DecodeCiscat
Summary
Wazuh is a free and open source platform used for threat prevention, detection, and response. Prior to 4.11.0, DecodeCiscat() implementation does not check the return the value of cJSON_GetObjectItem() for a possible NULL value in case of an error. A compromised agent can cause a crash of analysisd by sending a specially crafted message to the wazuh manager. An attacker who is able to craft and send an agent message to the wazuh manager can cause analysisd to crash and make it unavailable. This vulnerability is fixed in 4.11.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-29 19:01 UTC
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/wazuh/wazuh/security/advisorie… | x_refsource_CONFIRM |
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"cveId": "CVE-2025-62791",
"datePublished": "2025-10-29T16:48:25.220Z",
"dateReserved": "2025-10-22T18:55:48.011Z",
"dateUpdated": "2025-10-29T19:03:17.183Z",
"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.