CVE-2026-125406

Ettercap through 0.8.4.1 Stack Buffer Underwrite via Telnet Dissector Backspace Handling

Published Nov 9, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Ettercap
Ettercap ettercap
Vendors & Products Ettercap
Ettercap ettercap
Type Values Removed Values Added
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.
Title Ettercap through 0.8.4.1 Stack Buffer Underwrite via Telnet Dissector Backspace Handling
First Time appeared Ettercap-project
Ettercap-project ettercap
Weaknesses CWE-124
CPEs cpe:2.3:a:ettercap-project:ettercap:*:*:*:*:*:*:*:*
Vendors & Products Ettercap-project
Ettercap-project ettercap
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 13, 2026, 2:55 PM
Reserved
Nov 9, 2026, 10:03 PM
Status
Awaiting Analysis
Published
Nov 10, 2026, 12:17 AM
Modified
Nov 13, 2026, 3:17 PM