CVE-2026-125402 Ettercap through 0.8.4.1 Heap Out-of-Bounds Read via TLS SNI Parsing
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-125402?
CVE-2026-125402 is a high-severity vulnerability in ettercap, published on 9 Nov 2026.
Official description
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.
Weakness: CWE-125
Which versions are affected by CVE-2026-125402?
How do I fix CVE-2026-125402?
No fix has been published for CVE-2026-125402 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-125402 being exploited?
There is no known exploitation of CVE-2026-125402 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-125402, GHSA-7xp2-vr9x-v8pj, GHSA-v48w-7cvh-c7f4, UBUNTU-CVE-2026-125402.