Falhas do tipo CWE-787
5.143 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-2026-85440CRITICALMOOS core-moos through 10.4.0 MOOSDB Pre-Authentication Heap Overflow via Negative Packet LengthEPSS 1.0%CVE-2026-26740HIGHBuffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwritingEPSS 1.0%CVE-2024-24543CRITICALBuffer Overflow vulnerability in the function setSchedWifi in Tenda AC9 v.3.0, firmware version v.15.03.06.42_multi allows a remote attackerEPSS 1.0%CVE-2023-46536HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function chkRegVeriRegister.EPSS 1.0%CVE-2023-46526HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function resetCloudPwdRegister.EPSS 1.0%CVE-2023-46535HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function getResetVeriRegister.EPSS 1.0%CVE-2023-46525HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function loginRegister.EPSS 1.0%CVE-2023-46520HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function uninstallPluginReqHandEPSS 1.0%CVE-2023-46534HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function modifyAccPwdRegister.EPSS 1.0%CVE-2023-46537HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function getRegVeriRegister.EPSS 1.0%CVE-2023-46540HIGHTOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formNtp.EPSS 1.0%CVE-2023-46523HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function upgradeInfoRegister.EPSS 1.0%CVE-2023-46544HIGHTOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formWirelessTbl.EPSS 1.0%CVE-2023-46538HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function chkResetVeriRegister.EPSS 1.0%CVE-2023-46543HIGHTOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formWlSiteSurvey.EPSS 1.0%CVE-2023-46542HIGHTOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formMeshUploadConfig.EPSS 1.0%CVE-2023-46539HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function registerRequestHandle.EPSS 1.0%CVE-2023-46541HIGHTOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formIpv6Setup.EPSS 1.0%CVE-2023-46521HIGHTP-LINK TL-WR886N V7.0_3.0.14_Build_221115_Rel.56908n.bin was discovered to contain a stack overflow via the function RegisterRegister.EPSS 1.0%CVE-2023-32874CRITICALIn Modem IMS Stack, there is a possible out of bounds write due to a missing bounds check. This could lead to remote code execution with no EPSS 1.0%