Out-of-bounds Read in Ettercap
CVE-2026-125402
Ettercap through 0.8.4.1 contains a heap out-of-bounds read vulnerability in sslw_get_clienthello_sni() in src/ec_sslwrap.c that trusts the unchecked 16-bit SNI length field. Network-adjacent attackers can send crafted TLS ClientHello messages during SSL interception to leak up to 64 KB of heap memory upstream or crash Ettercap.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-v48w-7cvh-c7f4 (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_sslwrap.c (technical-description)
- www.vulncheck.com/advisories/ettercap-through-0.8.4.1-heap-out-of-bounds-read-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-125402?
- CVE-2026-125402 is a high-severity vulnerability in Ettercap, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-11-10.
- How severe is CVE-2026-125402?
- High severity. CVSS v3 base score is 8.1 out of 10.