Weaknesses of type CWE-20

5,404 results

Validação inadequada de entrada

O software recebe dados do usuário ou de fontes externas, mas não verifica ou verifica de forma incompleta se esses dados têm as propriedades necessárias para processar com segurança. Isso permite que entradas malformadas, maliciosas ou inesperadas passem por controles e causem comportamentos indevidos — desde crashes até injeção de código.

Example

Uma aplicação web recebe um parâmetro numérico via GET, mas não valida se é realmente um número inteiro válido antes de usá-lo em uma consulta SQL. Um atacante envia um valor com caracteres especiais (ex: `1' OR '1'='1`), conseguindo injetar código SQL direto no banco de dados.

How to mitigate

Implemente validação rigorosa na entrada: defina o tipo, formato, comprimento e intervalo esperados; rejeite tudo que não se encaixe. Use listas de caracteres permitidos ('whitelist'), escape de dados para o contexto específico (SQL, HTML, URL) e bibliotecas de validação consolidadas. Nunca confie em dados do cliente.

CVE-2021-44371HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44365HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44368HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44360HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44379HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44361HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44373HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44358HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2022-3171MEDIUMMemory handling vulnerability in ProtocolBuffers Java core and liteEPSS 1.1%CVE-2022-20750MEDIUMCisco Redundancy Configuration Manager for Cisco StarOS Software TCP Denial of Service VulnerabilityEPSS 1.1%CVE-2025-12945LOWImproper input validation in NETGEAR Nighthawk router R7000PEPSS 1.1%CVE-2026-20812MEDIUMLDAP Tampering VulnerabilityEPSS 1.1%CVE-2022-36784CRITICALElsight – Elsight Halo Remote Code Execution (RCE)EPSS 1.1%CVE-2024-8073CRITICALCommand Injection Vulnerability in Hillstone Networks Web Application FirewallEPSS 1.1%CVE-2022-31766HIGHA vulnerability has been identified in RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2) (All versions < V7.1.2), RUGGEDCOM RM1224 LTE(4G) NAEPSS 1.1%CVE-2020-7848HIGHThe EFM ipTIME C200 IP Camera is affected by a Command Injection vulnerability in /login.cgi?logout=1 script. To exploit this vulnerability,EPSS 1.1%CVE-2023-2727MEDIUMBypassing policies imposed by the ImagePolicyWebhook admission pluginEPSS 1.1%CVE-2026-20856HIGHWindows Server Update Service (WSUS) Remote Code Execution VulnerabilityEPSS 1.1%CVE-2025-34129HIGHLILIN DVR RCE via Malicious FTP/NTP ConfigurationEPSS 1.1%CVE-2019-15613—A bug in Nextcloud Server 17.0.1 causes the workflow rules to depend their behaviour on the file extension when checking file mimetypes.EPSS 1.1%