CVE-2026-20108
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
A vulnerability in the web-based management interface of Cisco Catalyst SD-WAN Manager allows an authenticated, remote attacker to perform a cross-site scripting (XSS) attack against a user of the interface. This is due to insufficient input validation.
Risk Assessment
An attacker could trick a user into clicking a crafted link, leading to arbitrary script execution in the interface context or access to sensitive browser-based information, posing a risk to data confidentiality and integrity.
Recommendation
Apply the patches provided by Cisco immediately and restrict access to the management interface to trusted users and networks only.
Other vulnerabilities in Cisco Catalyst SD-WAN Manager
See all- CVE-2026-20262MediumActively exploited
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager allows an authenticated remote attacker to create or overwrite any file on the filesystem. This is due to improper input validation during file upload.
- CVE-2026-20294Medium
A vulnerability in the web-based management interface of Cisco Catalyst SD-WAN Manager allows an authenticated remote attacker with low privileges to view sensitive information in clear text. The issue is due to insufficient access control for certain template types, potentially exposing authentication credentials.
- CVE-2026-20224High
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, allows an unauthenticated, remote attacker to read arbitrary files stored on the affected system. The flaw is due to improper handling of XML External Entity (XXE) entries when parsing an XML file.
- CVE-2026-20210Medium
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager (formerly SD-WAN vManage) allows an authenticated, remote attacker with read-only permissions to modify configurations and perform unauthorized actions. The issue is due to a failure to redact sensitive information within device configurations and templates.
- CVE-2026-20209Medium
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager (formerly SD-WAN vManage) allows an authenticated attacker with read-only permissions to elevate privileges to high. The issue is due to sensitive session information being recorded in audit logs.
Original NVD description (English source)
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.