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.
6747 vulnerabilities reference this CWE, most recent first.
CVE-2025-12207 (GCVE-0-2025-12207)
Vulnerability from cvelistv5 – Published: 2025-10-27 02:32 – Updated: 2026-02-24 07:04 Disputed
VLAI
EPSS
VEX
Title
Kamailio Grammar Rule cfg.y yyerror_at null pointer dereference
Summary
A vulnerability has been found in Kamailio 5.5. This affects the function yyerror_at of the file src/core/cfg.y of the component Grammar Rule Handler. Such manipulation leads to null pointer dereference. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-28 13:59 UTC
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.329877 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.329877 | signaturepermissions-required |
| https://vuldb.com/?submit.673241 | third-party-advisory |
| https://shimo.im/docs/vVqRMVMlrycMO63y/ | exploit |
| https://www.openwall.com/lists/oss-security/2025/… | related |
| https://www.openwall.com/lists/oss-security/2025/… | |
| http://www.openwall.com/lists/oss-security/2025/1… | |
| http://www.openwall.com/lists/oss-security/2025/10/27/8 | |
| https://shimo.im/docs/vVqRMVMlrycMO63y | exploit |
Impacted products
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CVE-2025-12206 (GCVE-0-2025-12206)
Vulnerability from cvelistv5 – Published: 2025-10-27 02:32 – Updated: 2026-02-24 07:04 Disputed
VLAI
EPSS
VEX
Title
Kamailio rvalue.c rve_is_constant null pointer dereference
Summary
A flaw has been found in Kamailio 5.5. The impacted element is the function rve_is_constant of the file src/core/rvalue.c. This manipulation causes null pointer dereference. The attack needs to be launched locally. The exploit has been published and may be used. It is still unclear if this vulnerability genuinely exists. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-28 14:00 UTC
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.329876 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.329876 | signaturepermissions-required |
| https://vuldb.com/?submit.673240 | third-party-advisory |
| https://shimo.im/docs/aBAYMVMB2jUP9jAj/ | exploit |
| https://www.openwall.com/lists/oss-security/2025/… | related |
| https://www.openwall.com/lists/oss-security/2025/… | |
| http://www.openwall.com/lists/oss-security/2025/1… | |
| http://www.openwall.com/lists/oss-security/2025/10/27/8 | |
| https://shimo.im/docs/aBAYMVMB2jUP9jAj | exploit |
Impacted products
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CVE-2025-11848 (GCVE-0-2025-11848)
Vulnerability from cvelistv5 – Published: 2026-02-24 02:14 – Updated: 2026-02-24 20:25
VLAI
EPSS
VEX
Summary
A null pointer dereference vulnerability in the Wake-on-LAN CGI program of the Zyxel VMG3625-T50B firmware version through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5.50(ABVL.4.8)C0 could allow an authenticated attacker with administrator privileges to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-24 20:24 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | VMG3625-T50B firmware |
Affected:
<= 5.50(ABPM.9.6)C0
|
|
| Zyxel | WX3100-T0 firmware |
Affected:
<= 5.50(ABVL.4.8)C0
|
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CVE-2025-11847 (GCVE-0-2025-11847)
Vulnerability from cvelistv5 – Published: 2026-02-24 02:09 – Updated: 2026-02-24 20:27
VLAI
EPSS
VEX
Summary
A null pointer dereference vulnerability in the IP settings CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5.50(ABVL.4.8)C0 could allow an authenticated attacker with administrator privileges to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-24 20:26 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | VMG3625-T50B firmware |
Affected:
<= 5.50(ABPM.9.6)C0
|
|
| Zyxel | WX3100-T0 firmware |
Affected:
<= 5.50(ABVL.4.8)C0
|
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CVE-2025-11846 (GCVE-0-2025-11846)
Vulnerability from cvelistv5 – Published: 2026-02-24 01:37 – Updated: 2026-02-24 16:09
VLAI
EPSS
VEX
Summary
A null pointer dereference vulnerability in the account settings CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5.50(ABVL.4.8)C0 could allow an authenticated attacker with administrator privileges to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-24 16:07 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
2 products
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|---|---|---|---|
| Zyxel | VMG3625-T50B firmware |
Affected:
<= 5.50(ABPM.9.6)C0
|
|
| Zyxel | WX3100-T0 firmware |
Affected:
<= 5.50(ABVL.4.8)C0
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CVE-2025-11845 (GCVE-0-2025-11845)
Vulnerability from cvelistv5 – Published: 2026-02-24 01:30 – Updated: 2026-02-24 16:12
VLAI
EPSS
VEX
Summary
A null pointer dereference vulnerability in the certificate downloader CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.6)C0 and the Zyxel WX3100-T0 firmware versions through 5.50(ABVL.4.8)C0 could allow an authenticated attacker with administrator privileges to trigger a denial-of-service (DoS) condition by sending a crafted HTTP request.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-24 16:11 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
2 products
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|---|---|---|---|
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Affected:
<= 5.50(ABPM.9.6)C0
|
|
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CVE-2025-11618 (GCVE-0-2025-11618)
Vulnerability from cvelistv5 – Published: 2025-10-10 17:10 – Updated: 2025-10-10 20:31
VLAI
EPSS
VEX
Title
Invalid Pointer Dereference when receiving UDP/IPv6 packets in FreeRTOS-Plus-TCP
Summary
A missing validation check in FreeRTOS-Plus-TCP's UDP/IPv6 packet processing code can lead to an invalid pointer dereference when receiving a UDP/IPv6 packet with an incorrect IP version field in the packet header. This issue only affects applications using IPv6.
We recommend upgrading to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-10 20:30 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/rel… | patchproduct |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/sec… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | FreeRTOS-Plus-TCP |
Affected:
4.0.0 , < 4.3.4
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CVE-2025-11550 (GCVE-0-2025-11550)
Vulnerability from cvelistv5 – Published: 2025-10-09 18:02 – Updated: 2026-02-24 06:56
VLAI
EPSS
VEX
Title
Tenda W12 HTTP Request modules wifiScheduledSet null pointer dereference
Summary
A vulnerability was found in Tenda W12 3.0.0.6(3948). The impacted element is the function wifiScheduledSet of the file /goform/modules of the component HTTP Request Handler. The manipulation of the argument wifiScheduledSet results in null pointer dereference. The attack may be performed from remote. The exploit has been made public and could be used.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-09 19:23 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.327709 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.327709 | signaturepermissions-required |
| https://vuldb.com/?submit.670118 | third-party-advisory |
| https://github.com/z472421519/BinaryAudit/blob/ma… | exploit |
| https://www.tenda.com.cn/ | product |
Impacted products
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CVE-2025-11187 (GCVE-0-2025-11187)
Vulnerability from cvelistv5 – Published: 2026-01-27 15:59 – Updated: 2026-03-20 14:07
VLAI
EPSS
VEX
Title
Improper validation of PBMAC1 parameters in PKCS#12 MAC verification
Summary
Issue summary: PBMAC1 parameters in PKCS#12 files are missing validation
which can trigger a stack-based buffer overflow, invalid pointer or NULL
pointer dereference during MAC verification.
Impact summary: The stack buffer overflow or NULL pointer dereference may
cause a crash leading to Denial of Service for an application that parses
untrusted PKCS#12 files. The buffer overflow may also potentially enable
code execution depending on platform mitigations.
When verifying a PKCS#12 file that uses PBMAC1 for the MAC, the PBKDF2
salt and keylength parameters from the file are used without validation.
If the value of keylength exceeds the size of the fixed stack buffer used
for the derived key (64 bytes), the key derivation will overflow the buffer.
The overflow length is attacker-controlled. Also, if the salt parameter is
not an OCTET STRING type this can lead to invalid or NULL pointer
dereference.
Exploiting this issue requires a user or application to process
a maliciously crafted PKCS#12 file. It is uncommon to accept untrusted
PKCS#12 files in applications as they are usually used to store private
keys which are trusted by definition. For this reason the issue was assessed
as Moderate severity.
The FIPS modules in 3.6, 3.5 and 3.4 are not affected by this issue, as
PKCS#12 processing is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5 and 3.4 are vulnerable to this issue.
OpenSSL 3.3, 3.0, 1.1.1 and 1.0.2 are not affected by this issue as they do
not support PBMAC1 in PKCS#12.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-20 03:55 UTC
Assigner
References
5 references
Impacted products
Date Public
2026-01-27 14:00
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CVE-2025-11156 (GCVE-0-2025-11156)
Vulnerability from cvelistv5 – Published: 2025-11-28 14:26 – Updated: 2025-11-28 14:35
VLAI
EPSS
VEX
Title
Improper Service Loading Vulnerability in Netskope Endpoint DLP Driver
Summary
Netskope was notified about a potential gap in its agent (NS Client) on Windows systems. If this gap is successfully exploited, a local, authenticated user with Administrator privileges can improperly load the driver as a generic kernel service. This triggers the flaw, causing a system crash (Blue-Screen-of-Death) and resulting in a Denial of Service (DoS) for the affected machine.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-28 14:35 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Netskope | Netskope Client |
Affected:
0 , < R132
(custom)
|
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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.