CVE-2020-3579

Name: CVE-2020-3579
Creator: NVD / NIST
Published: 2020-11-06T19:15:14.923+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.83%

Last modified Jun 17, 2026

CVE-2020-3579 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. The vulnerability exists because the web-based management interface does not properly validate user-supplied input. EPSS estimates a 0.83% chance of exploitation in the next 30 days.

Description

A vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. The vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or access sensitive, browser-based information.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.83%

52.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Catalyst Sd-Wan Manager	20.3.1
Cisco	Sd-Wan Vmanage	<= 20.1.12

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmxss2-NL4KSSVRPatch, Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmxss2-NL4KSSVRPatch, Vendor Advisory

Timeline

Published: Nov 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3579?

How severe is CVE-2020-3579?

CVE-2020-3579 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.83% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3579?

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-2020-3579?

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

Scan your code now

Source: NVD / NIST