CVE-2021-1486

Name: CVE-2021-1486
Creator: NVD / NIST
Published: 2021-05-06T13:15:10.397+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2021-1486 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A vulnerability in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to enumerate user accounts. This vulnerability is due to the improper handling of HTTP headers. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

A vulnerability in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to enumerate user accounts. This vulnerability is due to the improper handling of HTTP headers. An attacker could exploit this vulnerability by sending authenticated requests to an affected system. A successful exploit could allow the attacker to compare the HTTP responses that are returned by the affected system to determine which accounts are valid user accounts.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.20%

64.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Cisco	Catalyst Sd-Wan Manager	>= 20.4, < 20.4.1
Cisco	Sd-Wan Vmanage	< 20.3.3

References

Timeline

Published: May 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-1486?

How severe is CVE-2021-1486?

CVE-2021-1486 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-1486?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-1486?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST