What is CVE-2026-20167?

CVE-2026-20167 is a high-severity vulnerability in Cisco Iot Field Network Director (Iot-fnd), classified under Improper Access Control. CVSS score: 7.7/10. Published 2026-05-06.

How severe is CVE-2026-20167?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Cisco Iot Field Network Director (Iot-fnd)

CVE-2026-20167

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…

EPSS: 0.001 (34.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

Affected products

Cisco Iot Field Network Director (Iot-fnd) — versions 4.5.1, 4.4.3, 4.1.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

cisco-sa-iot-fnd-dos-n8N26Q4u

Frequently asked questions

What is CVE-2026-20167?: CVE-2026-20167 is a high-severity vulnerability in Cisco Iot Field Network Director (Iot-fnd), classified under Improper Access Control. CVSS score: 7.7/10. Published 2026-05-06.
How severe is CVE-2026-20167?: High severity. CVSS v3 base score is 7.7 out of 10.