CVE-2026-20294 Cisco CVE debrief

Who should care

Administrators and security teams responsible for Cisco Catalyst SD-WAN Manager systems, as well as users with access to the web-based management interface, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

A vulnerability in the web-based management interface of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to view sensitive information in clear text on an affected system. This vulnerability is due to insufficient access control enforcement for specific template types that are not included in the encryption allowlist. A low-privileged attacker could exploit this vulnerability by viewing logs on the local system or on a remote logging server. A successful exploit could allow the attacker to view sensitive authentication credentials, which could lead to further compromise of network infrastructure and connected services.

Defensive priority

Authenticated remote attackers could view sensitive information due to insufficient access control enforcement for specific template types.

Recommended defensive actions

• Review and update access control lists for Cisco Catalyst SD-WAN Manager to ensure only authorized personnel have access to sensitive information.
• Implement additional logging and monitoring to detect and respond to potential exploitation attempts.
• Verify and apply vendor-provided patches or updates to address the vulnerability.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The vulnerability exists in the web-based management interface of Cisco Catalyst SD-WAN Manager. Insufficient access control enforcement for specific template types allows low-privileged attackers to view sensitive authentication credentials by accessing logs on the local system or a remote logging server.

Official resources