What’s Vulnerable › Vulnerabilities
CVE-2026-20108
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-25 · updated 2026-06-29
- Weakness: CWE-79
Description
A vulnerability in the web-based management interface of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface of an affected device. This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user of the web-based management interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
Affected products
- Cisco Catalyst SD-WAN Manager: from 20.12 before 20.12.5.3; from 20.13 before 20.15.4.2; from 20.16 before 20.18.2.1; 20.12.6 — fixed in 20.12.5.3, 20.15.4.2, 20.18.2.1
How to fix
Upgrade to a fixed version: Cisco Catalyst SD-WAN Manager 20.12.5.3, 20.15.4.2, 20.18.2.1. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-20108 or the next vulnerability affects your stack