CVE-2026-20245 remediation guide

Cisco Cisco Catalyst SD-WAN Controller, Cisco Catalyst SD-WAN Manager, catalyst sd-wan manager

A vulnerability in the CLI of Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an authenticated, local attacker to execute arbitrary commands as root by supplying a crafted file to the affected system. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by uploading a crafted file to the affected system. A successful exploit could allow the attacker to perform command injection attacks o...

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ProductCisco Cisco Catalyst SD-WAN Controller, Cisco Catalyst SD-WAN Manager, catalyst sd-wan manager

Affected versions>= 20.6.4, >= 20.9.2, >= 20.3.6, >= 20.7.2, >= 20.7.1, >= 20.5.1, >= 20.6.2, >= 19.3.0, >= 20.6.1, >= 17.2.4, >= 18.2.0, >= 18.4.6, >= 19.1.0, >= 19.2.4, >= 19.2.929, >= 18.3.8, >= 18.4.303, >= 18.3.7, >= 18.4.1, >= 19.2.097

Fixed versions20.9.9.1, 20.12.5.4, 20.12.6.2, 20.15.4.4, 20.15.5.2, 20.18.2.2, 26.1.1.1

Priority basisImmediate · CVSS 7.8 · EPSS 25.3%

Identify the affected asset

Confirm whether Cisco Cisco Catalyst SD-WAN Controller, Cisco Catalyst SD-WAN Manager, catalyst sd-wan manager is installed, record the deployed version and installation path, and identify exposed interfaces.

Record the product name, package or appliance identifier, and installed version.
Identify internet-facing, administrative, API, and internal access paths.
Preserve the pre-change configuration and relevant service logs.

Validate the affected-version match

Compare the deployed version with the affected range: >= 20.6.4, >= 20.9.2, >= 20.3.6, >= 20.7.2, >= 20.7.1, >= 20.5.1, >= 20.6.2, >= 19.3.0, >= 20.6.1, >= 17.2.4, >= 18.2.0, >= 18.4.6, >= 19.1.0, >= 19.2.4, >= 19.2.929, >= 18.3.8, >= 18.4.303, >= 18.3.7, >= 18.4.1, >= 19.2.097. Treat incomplete inventory results as unresolved.

Prioritize with independent signals

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog. Combine this signal with asset criticality, exposure, compensating controls, and business impact.

Apply supported remediation

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Verify the result

Confirm the resulting version, service health, authentication and access paths, monitoring coverage, and relevant security logs.

Confirm the expected version and package state.
Run a functional health check for critical service paths.
Review authentication, error, application, and security monitoring logs.
Reassess exposure if the supported fix cannot be applied.

Operational boundary

This page does not replace the vendor advisory, support contract, change-management process, or recovery plan. Do not infer that an asset is unaffected from an incomplete inventory query or a missing fixed-version field.