High severity8.8NVD Advisory· Published Nov 10, 2026
CVE-2026-125406
CVE-2026-125406
Description
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.
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Affected products
1Patches
Vulnerability mechanics
References
5- github.com/Ettercap/ettercap/blob/v0.8.4.1/src/dissectors/ec_telnet.cnvd
- github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98nvd
- github.com/Ettercap/ettercap/pull/1330nvd
- github.com/Ettercap/ettercap/security/advisories/GHSA-w5ch-7c4x-crccnvd
- www.vulncheck.com/advisories/ettercap-through-0.8.4.1-stack-buffer-underwrite-via-telnet-dissector-backspace-handlingnvd
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