There are no workarounds that address these vulnerabilities.
Cisco Meraki recommends that administrators upgrade devices to a fixed software release. However, as a mitigation to these vulnerabilities, disabling Cisco AnyConnect VPN will remove the attack vector for the vulnerabilities that are described in this advisory.
While this mitigation has been deployed and were proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.