Falhas do tipo CWE-121

3.834 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-2026-9150MEDIUMLibsolv: stack-based buffer overflow in libsolv's debian metadata parser when handling sha384/sha512 checksumsEPSS 0.6%CVE-2021-38427MEDIUMRTI Connext DDS Professional and Connext DDS Secure Stack-based Buffer OverflowEPSS 0.6%CVE-2026-35085HIGHStack buffer overflow in method gdv-serverconfigEPSS 0.6%CVE-2021-38433MEDIUMRTI Connext DDS Professional and Connext DDS Secure Stack-based Buffer OverflowEPSS 0.6%CVE-2026-25790MEDIUMWazuh has Stack-Based Buffer Overflow in Security Configuration Assessment JSON ParserEPSS 0.6%CVE-2023-41279MEDIUMQTS, QuTS hero, QuTScloudEPSS 0.6%CVE-2023-41280MEDIUMQTS, QuTS hero, QuTScloudEPSS 0.6%CVE-2026-81945HIGHPLANET IGS-5225-8P2T4S V1/V2 Admin Stack-Based Buffer Overflow via Web ServerEPSS 0.6%CVE-2023-54334HIGHExplorer32++ 1.3.5.531 - Buffer overflowEPSS 0.6%CVE-2025-1594MEDIUMFFmpeg AAC Encoder aacenc_tns.c ff_aac_search_for_tns stack-based overflowEPSS 0.6%CVE-2024-32320MEDIUMTenda AC500 V2.0.1.9(1307) firmware has a stack overflow vulnerability via the timeZone parameter in the formSetTimeZone function.EPSS 0.6%CVE-2024-40416MEDIUMA vulnerability in /goform/SetVirtualServerCfg in the sub_6320C function in Tenda AX1806 1.0.0.1 firmware leads to stack-based buffer overflEPSS 0.6%CVE-2021-34982HIGHNETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-69412HIGHWindows DHCP Server Remote Code Execution VulnerabilityEPSS 0.6%CVE-2025-11783HIGHStack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50EPSS 0.6%CVE-2026-22904CRITICALStack Overflow via Oversized Cookie Fields in lighttpdEPSS 0.6%CVE-2025-3203MEDIUMTenda W18E setModules formSetAccountList stack-based overflowEPSS 0.6%CVE-2026-88289HIGHGV-LPC2011/LPC2211 - Multiple Pre-Authentication Stack Buffer Overflows in VLSVR Request HandlersEPSS 0.6%CVE-2020-27749—A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their correspondiEPSS 0.6%CVE-2024-50694CRITICALIn SunGrow WiNet-SV200.001.00.P027 and earlier versions, when copying the timestamp read from an MQTT message, the underlying code does not EPSS 0.6%