CVE-2026-20167 — Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability

Description (CNA)

A vulnerability in the web-based management interface of Cisco IoT Field Network Director could allow an authenticated, remote attacker with low privileges to cause a DoS condition on a remotely managed router. This vulnerability is due to improper error handling. An attacker could exploit this vulnerability by submitting crafted input to the web-based management interface. A successful exploit could allow the attacker to request unauthorized files from a remote router, causing the router to reload and resulting in a DoS condition.

Affected (CNA)

Vendor / product	Versions
Cisco / Cisco IoT Field Network Director (IoT-FND)	affected 4.5.1; affected 4.4.3; affected 4.1.0; affected 4.1.3; affected 4.6.1; affected 4.1.1; affected 4.4.0; affected 4.2.0; affected 4.4.2; affected 4.3.0; affected 4.6.0; affected 4.4.4; affected 4.3.2; affected 4.1.2; affected 4.4.1; affected 4.5.0; affected 4.3.1; affected 4.7.0; affected 4.6.2; affected 4.7.1; affected 4.7.2; affected 4.8.0; affected 4.8.1; affected 4.9.0; affected 4.9.1; affected 4.10.0; affected 4.9.2; affected 4.11.0; affected 4.12.0; affected 4.12.1

Vendor / product

Versions

Cisco / Cisco IoT Field Network Director (IoT-FND)

affected 4.5.1; affected 4.4.3; affected 4.1.0; affected 4.1.3; affected 4.6.1; affected 4.1.1; affected 4.4.0; affected 4.2.0; affected 4.4.2; affected 4.3.0; affected 4.6.0; affected 4.4.4; affected 4.3.2; affected 4.1.2; affected 4.4.1; affected 4.5.0; affected 4.3.1; affected 4.7.0; affected 4.6.2; affected 4.7.1; affected 4.7.2; affected 4.8.0; affected 4.8.1; affected 4.9.0; affected 4.9.1; affected 4.10.0; affected 4.9.2; affected 4.11.0; affected 4.12.0; affected 4.12.1

CWE

CWE-284

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iot-fnd-dos-n8N26Q4u

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.