Is CVE-2020-11939 actively exploited?

No active exploitation of CVE-2020-11939 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-11939 be exploited remotely?

Yes. CVE-2020-11939 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-11939?

CVE-2020-11939 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-11939

CRITICAL

CVE-2020-11939

CWE-190Published: April 23, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In nDPI through 3.2 Stable, the SSH protocol dissector has multiple KEXINIT integer overflows that result in a controlled remote heap overflow in concat_hash_string in ssh.c. Due to the granular nature of the overflow primitive and the ability to control both the contents and layout of the nDPI library's heap memory through remote input, this vulnerability may be abused to achieve full Remote Code Execution against any network inspection stack that is linked against nDPI and uses it to perform network traffic analysis.

NVD Source

Technical Analysis

CVE-2020-11939 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.