{"id":"CVE-2026-125406","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-125406","summary":"Ettercap through 0.8.4.1 contains a stack buffer underwrite vulnerability in the telnet dissector in src/dissectors/ec_telnet.c that decrements the output pointer on backspace without…","details":"Ettercap through 0.8.4.1 contains a stack buffer underwrite vulnerability in the telnet dissector in src/dissectors/ec_telnet.c that decrements the output pointer on backspace without a lower bound check. Attackers can send a telnet stream with more backspaces than preceding characters to write below the stack buffer, corrupting the stack of the Ettercap process that normally runs as root.","published":"2026-11-10T00:17:15.507","modified":"2026-11-10T00:17:15.507","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98","label":"Ettercap/ettercap@1d8badb"},"references":[{"type":"WEB","url":"https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/dissectors/ec_telnet.c#L150-L159"},{"type":"WEB","url":"https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98"},{"type":"WEB","url":"https://github.com/Ettercap/ettercap/pull/1330"},{"type":"WEB","url":"https://github.com/Ettercap/ettercap/security/advisories/GHSA-w5ch-7c4x-crcc"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-stack-buffer-underwrite-via-telnet-dissector-backspace-handling"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-11-10T00:17:15.507"}}