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Vulnerability record

CVE-2026-125402

highCVSS 4.0 7.2EPSS 0.25%Published · Ettercap

The short answer

CVE-2026-125402 affects Ettercap ettercap and is rated high (CVSS 7.2). It is not in CISA's KEV catalog; EPSS puts the chance of exploitation in the next 30 days at 0.25%.

What it is

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.

Severity

7.2 high

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploited (CISA KEV)

Not listed

CISA lists confirmed exploitation only

EPSS, next 30 days

0.25%

Higher than 17% of scored CVEs

How it can be exploited

Attack vector
Adjacent network
Attack complexity
Low
Attack requirements
None
Privileges required
None
User interaction
None
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Affected products

ettercap. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-125402 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-11. FIRST's EPSS estimates a 0.25% chance of exploitation in the next 30 days.

How do I fix CVE-2026-125402?

Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Received. The description is NVD's text, quoted as published.

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