Falhas do tipo CWE-20

5.887 resultados

Validação inadequada de entrada

A aplicação recebe dados do usuário ou de fontes externas mas não valida (ou valida mal) se esses dados têm as propriedades necessárias para processamento seguro. Isso abre porta para injeção de código, buffer overflow, lógica corrompida e outros ataques que exploram dados malformados ou maliciosos.

Exemplo

Um formulário web aceita um CPF sem verificar se tem 11 dígitos numéricos, ou um app móvel recebe um ID de usuário em JSON sem confirmar se é um inteiro — atacantes exploram isso para acessar dados de outros usuários, executar queries SQL maliciosas ou causar erro de processamento.

Como mitigar

Implemente validação rigorosa na entrada: verifique tipo, comprimento, formato, intervalo de valores permitidos. Use whitelist (aceitar só o que você sabe ser seguro) em vez de blacklist. Valide tanto no cliente quanto no servidor, e use bibliotecas de parsing seguro para formatos complexos (XML, JSON).

CVE-2020-1672HIGHJunos OS: jdhcpd process crash when processing a specific DHCPDv6 packet in DHCPv6 relay configuration.EPSS 1.0%CVE-2021-1221MEDIUMCisco Webex Meetings and Cisco Webex Meetings Server Software Hyperlink Injection VulnerabilityEPSS 1.0%CVE-2026-1668HIGHInput Validation Vulnerability on Multiple Omada SwitchesEPSS 1.0%CVE-2019-13932—A vulnerability has been identified in XHQ (All versions < V6.0.0.2). The web application requests could be manipulated, causing the the appEPSS 1.0%CVE-2020-3139MEDIUMCisco Application Policy Infrastructure Controller Out Of Band Management IP Tables Bypass VulnerabilityEPSS 1.0%CVE-2022-0567—A flaw was found in ovn-kubernetes. This flaw allows a system administrator or privileged attacker to create an egress network policy that bEPSS 1.0%CVE-2022-22539—When a user opens a manipulated JPEG file format (.jpg, 2d.x3d) received from untrusted sources in SAP 3D Visual Enterprise Viewer - versionEPSS 1.0%CVE-2021-30501—An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of servEPSS 1.0%CVE-2023-25915CRITICALAuthenticated Remote Command Execution in Danfoss AK-SM800AEPSS 1.0%CVE-2018-0303—A vulnerability in the Cisco Discovery Protocol component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adEPSS 1.0%CVE-2018-10921MEDIUMCertain input files may trigger an integer overflow in ttembed input file processing. This overflow could potentially lead to corruption of EPSS 1.0%CVE-2025-31477CRITICALImproper Scope Validation in the open Endpoint of tauri-plugin-shellEPSS 1.0%CVE-2023-2315HIGHPath Traversal in OpenCart versions 4.0.0.0 to 4.0.2.2EPSS 1.0%CVE-2026-28335HIGHSolarWinds Dameware Buffer Overflow VulnerabilityEPSS 1.0%CVE-2023-5188HIGHWAGO Improper Input Validation in IEC61850 Server / TelecontrolEPSS 1.0%CVE-2025-55270LOWHCL Aftermarket DPC is affected by Improper Input ValidationEPSS 1.0%CVE-2024-26181MEDIUMWindows Kernel Denial of Service VulnerabilityEPSS 1.0%CVE-2021-42121MEDIUMDenial of Service via Invalid Date Format in TopEaseEPSS 1.0%CVE-2021-27420MEDIUMGE UR family input validationEPSS 1.0%CVE-2020-1756—In Moodle before 3.8.2, 3.7.5, 3.6.9 and 3.5.11, insufficient input escaping was applied to the PHP unit webrunner admin tool.EPSS 1.0%