Falhas do tipo CWE-121

3.826 resultados

Estouro de buffer na pilha

Ocorre quando código escreve mais dados em um buffer alocado na pilha do que sua capacidade permite, sobrescrevendo dados adjacentes (variáveis, endereços de retorno). Um atacante pode explorar isso para executar código arbitrário ou crashar a aplicação alterando o fluxo de execução.

Exemplo

Uma função C que copia uma string do usuário diretamente em um array local sem validar tamanho: `char buffer[10]; strcpy(buffer, user_input);`. Se user_input tiver 50 caracteres, os 40 extras sobrescrevem a pilha, incluindo potencialmente o endereço de retorno da função.

Como mitigar

Use funções seguras que limitam escrita (strncpy, snprintf em vez de strcpy/sprintf), valide tamanho de entrada antes de copiar, ative proteções do compilador (stack canaries, ASLR) e use ferramentas de análise estática para detectar cópias sem limite.

CVE-2026-78439HIGHMicrosoft Office Graphics Component Remote Code Execution VulnerabilityEPSS 0.8%CVE-2024-37050MEDIUMQTS, QuTS heroEPSS 0.8%CVE-2024-37047MEDIUMQTS, QuTS heroEPSS 0.8%CVE-2025-12211HIGHTenda O3 setDmzInfo GetValue stack-based overflowEPSS 0.8%CVE-2020-1605HIGHJunos OS and Junos OS Evolved: A vulnerability in JDHCPD allows an attacker to send crafted IPv4 packets and arbitrarily execute commands on the target device.EPSS 0.8%CVE-2026-10062HIGHTRENDnet TEW-432BRP formSetRoute stack-based overflowEPSS 0.8%CVE-2026-39047HIGHBuffer Overflow vulnerability in EPSON L14150 FL27PB allows a remote attacker to execute arbitrary code via the RAW Printing Service (JetDirEPSS 0.8%CVE-2024-46435HIGHA stack overflow vulnerability in the Tenda W18E V16.01.0.8(1625) web management portal allows an authenticated remote attacker to cause a dEPSS 0.8%CVE-2025-7796HIGHTenda FH451 PPTPDClient fromPptpUserAdd stack-based overflowEPSS 0.8%CVE-2025-7434HIGHTenda FH451 POST Request addressNat fromAddressNat stack-based overflowEPSS 0.8%CVE-2023-40478HIGHNETGEAR RAX30 Telnet CLI passwd Stack-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-15722HIGH389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in get_ruvelement_from_berval() via unbounded replica id parsingEPSS 0.8%CVE-2026-42854CRITICALarduino-esp32: Stack buffer overflow in WebServer multipart boundary parsing leads to remote crash potential RCEEPSS 0.8%CVE-2024-58299CRITICALPCMan FTP Server 2.0 Remote Buffer Overflow via 'pwd' CommandEPSS 0.8%CVE-2025-11386HIGHTenda AC15 POST Parameter SetDDNSCfg stack-based overflowEPSS 0.8%CVE-2025-11324HIGHTenda AC18 setNotUpgrade stack-based overflowEPSS 0.8%CVE-2024-3079HIGHASUS Router - Stack-based Buffer OverflowEPSS 0.8%CVE-2025-7921CRITICALASKEY｜modem - Stack-based Buffer OverflowEPSS 0.8%CVE-2025-29215MEDIUMTenda AX12 v22.03.01.46_CN was discovered to contain a stack overflow via the sub_43fdcc function at /goform/SetNetControlList.EPSS 0.8%CVE-2021-34862HIGHThis vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 1.01rc001 routerEPSS 0.8%