CVE-2021-40126 — MEDIUM (4.3)

Vulnerability Description

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.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Cisco	Umbrella	-

Related Weaknesses (CWE)

CWE-210 CWE-209

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uVendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uVendor Advisory

FAQ

What is CVE-2021-40126?

CVE-2021-40126 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 vulnerabilit...

How severe is CVE-2021-40126?

CVE-2021-40126 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40126?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Umbrella.