Falhas do tipo CWE-754

461 resultados

Falta de validação de condições excepcionais

A fraqueza ocorre quando o software não valida ou valida incorretamente situações anômalas que raramente acontecem durante a operação normal. O desenvolvedor assume que certas condições 'nunca vão acontecer', deixando o código vulnerável quando elas de fato ocorrem — seja por entrada malformada, estado corrompido ou cenários edge case não previstos.

Exemplo

Um parser JSON que só testa o caminho feliz: carrega e processa um JSON válido, mas quando recebe um arquivo com caracteres especiais, tamanho excepcional ou estrutura quebrada, falha silenciosamente ou causa comportamento indefinido em vez de rejeitar explicitamente o entrada inválida.

Como mitigar

Sempre validar entradas e estados, não presumir cenários 'impossíveis': use try-catch, verificações de limites, e testes que explorem casos anormais (fuzzing, boundary testing). Falhe de forma segura e explícita — nunca em silêncio.

CVE-2021-33605MEDIUMUnauthorized property update in CheckboxGroup component in Vaadin 12-14 and 15-20EPSS 0.7%CVE-2021-31364MEDIUMJunos OS: SRX Series: The flowd process will crash if log session-close is configured and specific traffic is receivedEPSS 0.7%CVE-2023-49607MEDIUMPlaybook plugin crash via missing interface type assertionEPSS 0.6%CVE-2023-34099MEDIUMImproper mail validation in ShopwareEPSS 0.6%CVE-2019-1849HIGHCisco IOS XR Software BGP MPLS-Based EVPN Denial of Service VulnerabilityEPSS 0.6%CVE-2024-47499HIGHJunos OS and Junos OS Evolved: In a BMP scenario receipt of a malformed AS PATH attribute can cause an RPD crashEPSS 0.6%CVE-2023-36835HIGHJunos OS: QFX10000 Series: All traffic will be dropped after a specific valid IP packet has been received which needs to be routed over a VXLAN tunnelEPSS 0.6%CVE-2025-12387MEDIUMDenial of Service in Pix-Link LV-WR21QEPSS 0.6%CVE-2022-22235MEDIUMJunos OS: SRX Series: A flowd core will be observed when malformed GPRS traffic is processedEPSS 0.6%CVE-2023-32716MEDIUMDenial of Service via the 'dump' SPL commandEPSS 0.6%CVE-2024-37151MEDIUMSuricata defrag: IP ID reuse can lead to policy bypassEPSS 0.6%CVE-2023-25619HIGH A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause denial of service of the controller wEPSS 0.6%CVE-2024-8175HIGHCODESYS: web server vulnerable to DoSEPSS 0.6%CVE-2023-28976HIGHJunos OS: MX Series: If a specific traffic rate goes above the DDoS threshold it will lead to an FPC crashEPSS 0.6%CVE-2026-0287MEDIUMPAN-OS: Denial of Service Vulnerabilities in Network Traffic ProcessingEPSS 0.6%CVE-2024-36128HIGHDirectus is soft-locked by providing a string value to random string utilEPSS 0.6%CVE-2023-22393HIGHJunos OS and Junos OS Evolved: RPD crash upon receipt of BGP route with invalid next-hop EPSS 0.6%CVE-2026-33939HIGHHandlebars.js has Denial of Service via Malformed Decorator Syntax in Template CompilationEPSS 0.6%CVE-2023-48431MEDIUMA vulnerability has been identified in SINEC INS (All versions < V1.0 SP2 Update 2). Affected software does not correctly validate the respoEPSS 0.6%CVE-2026-73549MEDIUMEnvoy - Incomplete fix for CVE-2026-26310: copyInternetAddressAndPort crashes on scoped IPv6 addresses in ORIGINAL_DST clustersEPSS 0.6%