#VU124592 Cross-site scripting in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20108
Published: March 25, 2026
Vulnerability identifier: #VU124592
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-20108
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
The disclosed vulnerability allows a remote user to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the web-based management interface. A remote user can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Remediation
Install security update from vendor's website.