Weaknesses of type CWE-121

3,819 results

Estouro de buffer na pilha

Ocorre quando um programa escreve mais dados em um buffer alocado na pilha do que ele pode conter, sobrescrevendo dados adjacentes (variáveis, endereços de retorno, ponteiros). Um atacante pode explorar isso para executar código arbitrário ou causar travamento.

Example

Um programa lê uma string do usuário com gets() ou strcpy() sem validar o tamanho, copiando 500 bytes para um buffer de 64 bytes. O excesso sobrescreve o endereço de retorno da função, permitindo desviar a execução para código malicioso.

How to mitigate

Use funções seguras (strncpy, fgets, snprintf) que aceitam limite de bytes; implemente verificações de limites explícitas no código; ative proteções do compilador/SO (stack canaries, DEP/NX, ASLR); use linguagens com verificação automática de limites ou ferramentas de análise estática.

CVE-2025-3820HIGHTenda W12/i24 httpd cgiSysUplinkCheckSet stack-based overflowEPSS 11.8%CVE-2021-38408—A stack-based buffer overflow vulnerability in Advantech WebAccess Versions 9.02 and prior caused by a lack of proper validation of the lengEPSS 11.6%CVE-2025-3785HIGHD-Link DWR-M961 Authorization Interface formStaticDHCP stack-based overflowEPSS 11.4%CVE-2025-4544HIGHD-Link DI-8100 jhttpd ddos.asp stack-based overflowEPSS 10.9%CVE-2020-10881CRITICALThis vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1EPSS 10.9%CVE-2025-7088HIGHBelkin F9K1122 webs formPPPoESetup stack-based overflowEPSS 10.9%CVE-2025-7087HIGHBelkin F9K1122 webs formL2TPSetup stack-based overflowEPSS 10.5%CVE-2021-38389CRITICALAdvantech WebAccessEPSS 10.4%CVE-2025-8017HIGHTenda AC7 httpd setMacFilterCfg formSetMacFilterCfg stack-based overflowEPSS 10.4%CVE-2023-20078CRITICALCisco IP Phone 6800, 7800, 7900, and 8800 Series Web UI VulnerabilitiesEPSS 10.4%CVE-2023-20079CRITICALCisco IP Phone 6800, 7800, 7900, and 8800 Series Web UI VulnerabilitiesEPSS 10.3%CVE-2020-27265—KEPServerEX: v6.0 to v6.9, ThingWorx Kepware Server: v6.8 and v6.9, ThingWorx Industrial Connectivity: All versions, OPC-Aggregator: All verEPSS 10.1%CVE-2021-27413—Omron CX-One Versions 4.60 and prior, including CX-Server Versions 5.0.29.0 and prior, are vulnerable to a stack-based buffer overflow, whicEPSS 10.0%CVE-2025-8184HIGHD-Link DIR-513 HTTP POST Request formSetWanL2TPtriggers formSetWanL2TPcallback stack-based overflowEPSS 9.9%CVE-2017-9629—A Stack-Based Buffer Overflow issue was discovered in Schneider Electric Wonderware ArchestrA Logger, versions 2017.426.2307.1 and prior. ThEPSS 9.8%CVE-2022-20701CRITICALCisco Small Business RV Series Routers VulnerabilitiesEPSS 9.7%KEVCVE-2018-17614—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Losant Arduino MQTT Client prior to V2.7EPSS 9.7%CVE-2021-1609CRITICALCisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Web Management VulnerabilitiesEPSS 9.7%CVE-2021-43982HIGHDelta Electronics CNCSoftEPSS 9.6%CVE-2018-10636—CNCSoft Version 1.00.83 and prior with ScreenEditor Version 1.00.54 has multiple stack-based buffer overflow vulnerabilities that could causEPSS 9.5%