Is CVE-2020-4207 actively exploited?

No active exploitation of CVE-2020-4207 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-4207 be exploited remotely?

Yes. CVE-2020-4207 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-4207?

CVE-2020-4207 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2020-4207

CWE-120Published: January 28, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

IBM Watson IoT Message Gateway 2.0.0.x, 5.0.0.0, 5.0.0.1, and 5.0.0.2 is vulnerable to a buffer overflow, caused by improper bounds checking when handling a failed HTTP request with specific content in the headers. By sending a specially crafted HTTP request, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause a denial of service. IBM X-Force ID: 174972.

NVD Source

Technical Analysis

CVE-2020-4207 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.