cvedb.io
CVE-2021-40126
MEDIUM · CVSS 4.3
EPSS exploitation probability: 0%
Published 2021-11-04T16:15:09.577 · Last modified 2026-06-17T04:06:34.307

Summary

A vulnerability in the web-based dashboard of Cisco Umbrella could allow an authenticated, remote attacker to perform an email enumeration attack against the Umbrella infrastructure. This vulnerability is due to an overly descriptive error message on the dashboard that appears when a user attempts to modify their email address when the new address already exists in the system. An attacker could exploit this vulnerability by attempting to modify the user's email address. A successful exploit could allow the attacker to enumerate email addresses of users in the system.

Affected products

cisco — umbrella

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.