Integer overflow in Ettercap
CVE-2026-125404
Ettercap through 0.8.4.1 contains an integer underflow in ccmp_decrypt() in src/ec_encryption_ccmp.c that subtracts the 8-byte CCMP trailer without checking minimum length. Attackers on a network whose WPA key is loaded can send a short crafted CCMP frame to overflow a stack buffer in the Ettercap process, which normally runs as root.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/Ettercap/ettercap/security/advisories/GHSA-j37f-7jx3-rf8j (vendor-advisory)
- github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98 (patch)
- github.com/Ettercap/ettercap/pull/1330 (issue-tracking, patch)
- github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_encryption_ccmp.c (technical-description)
- www.vulncheck.com/advisories/ettercap-through-0.8.4.1-stack-buffer-overflow-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-125404?
- CVE-2026-125404 is a high-severity vulnerability in Ettercap, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-11-10.
- How severe is CVE-2026-125404?
- High severity. CVSS v3 base score is 7.5 out of 10.