Is CVE-2020-3531 actively exploited?

No active exploitation of CVE-2020-3531 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-3531 be exploited remotely?

Yes. CVE-2020-3531 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-3531?

CVE-2020-3531 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-3531

CRITICAL

CVE-2020-3531

CWE-306Published: November 18, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A vulnerability in the REST API of Cisco IoT Field Network Director (FND) could allow an unauthenticated, remote attacker to access the back-end database of an affected system. The vulnerability exists because the affected software does not properly authenticate REST API calls. An attacker could exploit this vulnerability by obtaining a cross-site request forgery (CSRF) token and then using the token with REST API requests. A successful exploit could allow the attacker to access the back-end database of the affected device and read, alter, or drop information.

NVD Source

Technical Analysis

CVE-2020-3531 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.