Weaknesses of type CWE-20

5,386 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-2018-0173HIGHA vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP VersioEPSS 7.6%KEVCVE-2018-0174HIGHA vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticEPSS 7.6%KEVCVE-2023-23416HIGHWindows Cryptographic Services Remote Code Execution VulnerabilityEPSS 7.6%CVE-2025-34043CRITICALVacron NVR Remote Command ExecutionEPSS 7.5%CVE-2020-1040CRITICALA remote code execution vulnerability exists when Hyper-V RemoteFX vGPU on a host server fails to properly validate input from an authenticaEPSS 7.3%KEVCVE-2016-7068MEDIUMAn issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 3.7.4 and 4.0.4, allowing a remote, unauthenticateEPSS 7.3%CVE-2020-10885HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1EPSS 7.2%CVE-2018-0158HIGHA vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unautheEPSS 7.2%KEVCVE-2021-41079—Apache Tomcat DoS with unexpected TLS packetEPSS 7.2%CVE-2014-125117CRITICALD-Link info.cgi POST Request Stack-Based Buffer Overflow RCEEPSS 7.2%CVE-2017-12234HIGHMultiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 through 15.6 could allow anEPSS 7.1%KEVCVE-2017-12235HIGHA vulnerability in the implementation of the PROFINET Discovery and Configuration Protocol (PN-DCP) for Cisco IOS 12.2 through 15.6 could alEPSS 7.1%KEVCVE-2017-12233HIGHMultiple vulnerabilities in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS 12.4 through 15.6 could allow anEPSS 7.1%KEVCVE-2020-3383HIGHCisco Data Center Network Manager Path Traversal VulnerabilityEPSS 7.0%CVE-2022-45725HIGHImproper Input Validation in Comfast router CF-WR6110N V2.3.1 allows a remote attacker on the same network to execute arbitrary code on the EPSS 7.0%CVE-2024-38052HIGHKernel Streaming WOW Thunk Service Driver Elevation of Privilege VulnerabilityEPSS 7.0%CVE-2020-3280CRITICALCisco Unified Contact Center Express Remote Code Execution VulnerabilityEPSS 6.9%CVE-2022-35666HIGHAdobe Acrobat Reader Improper Input Validation Remote Code Execution VulnerabilityEPSS 6.9%CVE-2018-0159HIGHA vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE SoftwaEPSS 6.9%KEVCVE-2018-0253—A vulnerability in the ACS Report component of Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to eEPSS 6.8%