Falhas do tipo CWE-787
5.145 resultadosEscrita fora dos limites de memória
Ocorre quando um programa escreve dados em um endereço de memória fora da área alocada para um buffer ou variável. O código não valida o tamanho ou índice antes de gravar, permitindo sobrescrita de dados adjacentes, corrupção de estruturas críticas ou execução de código arbitrário.
Exemplo
Um formulário web que copia dados do usuário para um buffer de 256 bytes sem validar o tamanho da entrada. Se o atacante envia 500 bytes, a escrita transborda e sobrescreve a pilha, podendo hijackear o endereço de retorno da função.
Como mitigar
Use funções seguras de cópia (strncpy, strlcpy ao invés de strcpy; memcpy com tamanho máximo explícito) e sempre valide comprimento e índices antes de escrever. Em linguagens modernas, prefira estruturas com bounds-checking automático (arrays em Java, Rust, etc).
CVE-2021-42024—A vulnerability has been identified in Simcenter STAR-CCM+ Viewer (All versions < 2021.3.1). The starview+.exe application lacks proper valiEPSS 0.8%CVE-2022-31737CRITICALA malicious webpage could have caused an out-of-bounds write in WebGL, leading to memory corruption and a potentially exploitable crash. ThiEPSS 0.8%CVE-2021-44446—A vulnerability has been identified in JT Utilities (All versions < V13.0.3.0), JTTK (All versions < V11.0.3.0). JTTK library in affected prEPSS 0.8%CVE-2021-44430—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.8%CVE-2024-10487HIGHOut of bounds write in Dawn in Google Chrome prior to 130.0.6723.92 allowed a remote attacker to perform out of bounds memory access via a cEPSS 0.8%CVE-2021-44434—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.8%CVE-2021-44437—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.8%CVE-2021-44438—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.8%CVE-2021-44441—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.8%CVE-2021-44443—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.8%CVE-2021-44449—A vulnerability has been identified in JT Utilities (All versions < V12.8.1.1), JTTK (All versions < V10.8.1.1). JTTK library in affected prEPSS 0.8%CVE-2020-3415HIGHCisco NX-OS Software Data Management Engine Remote Code Execution VulnerabilityEPSS 0.8%CVE-2023-34610HIGHAn issue was discovered json-io thru 4.14.0 allows attackers to cause a denial of service or other unspecified impacts via crafted object thEPSS 0.8%CVE-2022-2043HIGHMOXA NPort 5110 Out-of-bounds WriteEPSS 0.8%CVE-2022-40651HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Ansys SpaceClaim 2022 R1. User interactionEPSS 0.8%CVE-2022-40658HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of NIKON NIS-Elements Viewer 1.2100.1483.0. UEPSS 0.8%CVE-2024-5696HIGHBy manipulating the text in an `<input>` tag, an attacker could have caused corrupt memory leading to a potentially exploitable crash.EPSS 0.8%CVE-2024-42815CRITICALIn the TP-Link RE365 V1_180213, there is a buffer overflow vulnerability due to the lack of length verification for the USER_AGENT field in EPSS 0.8%CVE-2025-20654CRITICALIn wlan service, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote code execution with no EPSS 0.8%CVE-2026-64608CRITICALApache Fory: Heap type confusion and out-of-bounds read/write in C++ compatible-mode field-skip pathsEPSS 0.8%