What is CVE-2020-26077?

CVE-2020-26077 is a medium-severity vulnerability in Cisco Iot Field Network Director (Iot-Fnd), classified under Improper Access Control. CVSS score: 4.3/10. Published 2020-11-18.

How severe is CVE-2020-26077?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Privilege escalation in Cisco Iot Field Network Director (Iot-Fnd)

CVE-2020-26077

A vulnerability in the access control functionality of Cisco IoT Field Network Director (FND) could allow an authenticated, remote attacker to view lists of users from different domains that are configured on an affected system. The vulnerability is due to improper access control. An attacker could exploit this vulnerability by sending an API request that alters the domain for a requested user list on an affected system. A successful exploit could allow the attacker to view lists of users from different domains on the affected system.

Published 2020-11-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.4th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-FND-LV-h… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2020-26077?: CVE-2020-26077 is a medium-severity vulnerability in Cisco Iot Field Network Director (Iot-Fnd), classified under Improper Access Control. CVSS score: 4.3/10. Published 2020-11-18.
How severe is CVE-2020-26077?: Medium severity. CVSS v3 base score is 4.3 out of 10.