Is CVE-2026-125405 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-125405 being exploited in the wild.

How severe is CVE-2026-125405?

High severity, with a CVSS score of 8.1, published 10 November 2026.

Is there a fix for CVE-2026-125405?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-125405 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-125405?

Check whether you run Ettercap at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-125405: Ettercap out-of-bounds read in NTLM parsing

CVE-2026-125405 · Severity: high · CVSS 8.1 · Published 2026-11-10

Ettercap is a network traffic analysis and interception tool used to monitor and debug network communications. An attacker can send a specially crafted HTTP request with an invalid NTLM authentication header that causes Ettercap to read beyond its allocated memory, either leaking sensitive data from memory or crashing the application.

Technologies: Ettercap. Vendors: Ettercap.

Quick answers

Is CVE-2026-125405 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-125405 being exploited in the wild.
How severe is CVE-2026-125405?: High severity, with a CVSS score of 8.1, published 10 November 2026.
Which products and versions are affected?: Ettercap through 0.8.4.1.
Is there a fix for CVE-2026-125405?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-125405 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-125405?: Check whether you run Ettercap at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The Parse_NTLM_Auth() function in src/dissectors/ec_http.c fails to validate NTLM message offsets before using them to read from a buffer, allowing out-of-bounds reads. An attacker observing traffic processed by Ettercap can trigger this by sending a crafted HTTP Authorization header with invalid NTLM offsets. The vulnerability results in information disclosure or denial of service.

Affected products

Ettercap Ettercap through 0.8.4.1

Timeline

2026-11-10: disclosed

References

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