Fallos del tipo CWE-476

2570 resultados

Desreferência de ponteiro nulo autenticada remota

A aplicação tenta acessar um objeto ou endereço de memória que não foi inicializado ou foi definido como nulo, sem verificar essa condição antes. Um atacante autenticado consegue provocar esse acesso inválido enviando dados malformados ou inesperados, causando crash ou comportamento indefinido.

Ejemplo

Um endpoint autenticado de API recebe um ID de usuário, faz uma busca no banco que retorna nulo (usuário não existe) e tenta acessar diretamente campos desse objeto nulo sem validação — resultando em erro 500 ou travamento da aplicação.

Cómo mitigar

Sempre verificar se um objeto é nulo antes de usá-lo; usar análise estática (linters, SAST) para detectar acessos potenciais a nulos; validar e tratar casos onde dados esperados podem estar ausentes, mesmo que o usuário esteja autenticado.

CVE-2026-21243HIGHWindows Lightweight Directory Access Protocol (LDAP) Denial of Service VulnerabilityEPSS 1.4%CVE-2022-2085—A NULL pointer dereference vulnerability was found in Ghostscript, which occurs when it tries to render a large number of bits in memory. WhEPSS 1.4%CVE-2024-8495HIGHA null pointer dereference in Ivanti Connect Secure before version 22.7R2.1 and Ivanti Policy Secure before version 22.7R1.1 allows a remoteEPSS 1.4%CVE-2022-43603MEDIUMA denial of service vulnerability exists in the ZfileOutput::close() functionality of OpenImageIO Project OpenImageIO v2.4.4.2. A specially EPSS 1.4%CVE-2022-43593MEDIUMA denial of service vulnerability exists in the DPXOutput::close() functionality of OpenImageIO Project OpenImageIO v2.4.4.2. A specially crEPSS 1.4%CVE-2020-3517HIGHCisco FXOS and NX-OS Software Cisco Fabric Services Denial of Service VulnerabilityEPSS 1.4%CVE-2025-29835MEDIUMWindows Remote Access Connection Manager Information Disclosure VulnerabilityEPSS 1.4%CVE-2021-40761MEDIUMAdobe After Effects NULL Pointer Dereference Application Denial of ServiceEPSS 1.4%CVE-2021-40756MEDIUMAdobe After Effects NULL Pointer Dereference Application Denial of ServiceEPSS 1.4%CVE-2026-1584HIGHGnutls: gnutls: remote denial of service via crafted clienthello with invalid psk binderEPSS 1.4%CVE-2022-2208HIGHNULL Pointer Dereference in vim/vimEPSS 1.4%CVE-2022-20746HIGHCisco Firepower Threat Defense Software TCP Proxy Denial of Service VulnerabilityEPSS 1.4%CVE-2024-37890HIGHDenial of service when handling a request with many HTTP headers in wsEPSS 1.4%CVE-2023-2617MEDIUMOpenCV wechat_qrcode Module decoded_bit_stream_parser.cpp decodeByteSegment null pointer dereferenceEPSS 1.4%CVE-2023-32171MEDIUMUnified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service VulnerabilityEPSS 1.4%CVE-2021-23180—A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary codeEPSS 1.4%CVE-2022-43972MEDIUMNull pointer dereference in Linksys WRT54GLEPSS 1.4%CVE-2011-1231HIGHwin32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows ServeEPSS 1.3%CVE-2026-38999HIGHA Null Pointer Dereference in the mk_sched_event_close function (mk_server/mk_scheduler.c) of Monkey through commit 4fb0c16 allows attackersEPSS 1.3%CVE-2021-40778MEDIUMAdobe Media Encoder Null Pointer Dereference Application denial-of-serviceEPSS 1.3%