CVE-2020-3531: Cisco IoT Field Network Director

Critical severity, CVSS 9.8. EPSS: 2.2% chance of exploitation in the next 30 days.

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.

Affected products

• Cisco IoT Field Network Director: before 4.6.1 (fixed in 4.6.1)

Published 2020-11-18. Last modified 2026-06-17.