Cisco SD-WAN vManage Software Unauthenticated Access to Messaging Services Vulnerability

  • A vulnerability in the binding configuration of Cisco SD-WAN vManage Software containers could allow an unauthenticated, adjacent attacker who has access to the VPN0 logical network to also access the messaging service ports on an affected system.This vulnerability exists because the messaging server container ports on an affected system lack sufficient protection mechanisms. An attacker could exploit this vulnerability by connecting to the messaging service ports of the affected system. To exploit this vulnerability, the attacker must be able to send network traffic to interfaces within the VPN0 logical network. This network may be restricted to protect logical or physical adjacent networks, depending on device deployment configuration. A successful exploit could allow the attacker to view and inject messages into the messaging service, which can cause configuration changes or cause the system to reload.Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.This advisory is available at the following link:

Affected Products

  • Vulnerable ProductsThis vulnerability affects Cisco devices if they are running a vulnerable release of Cisco SD-WAN vManage Software.For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory.Products Confirmed Not VulnerableOnly products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.Cisco has confirmed that this vulnerability does not affect the following Cisco products:
    • IOS XE SD-WAN Software
    • SD-WAN vBond Orchestrator Software
    • SD-WAN vEdge Cloud Routers
    • SD-WAN vEdge Routers
    • SD-WAN vSmart Controller Software


  • There is a workaround that addresses this vulnerability.Administrators can use access control lists (ACLs) to block ports 4222, 6222, and 8222, which are used by Cisco SD-WAN vManage Software messaging services. They may be configured in the following ways depending on deployment:
    • Configure ACLs on Cisco IOS devices. For information about preventing exploitation of Cisco IOS devices, see Protecting Your Core: Infrastructure Protection Access Control Lists.
    • Configure ACLs at the firewall that protects Cisco SD-WAN vManage Software. For information about Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD) ACL configuration, see Cisco ASA Series Firewall CLI Configuration Guide: Access Control Lists.
    • Cisco Cloud Controllers ACLs (Inbound Rules allowed list) are managed through the Self-Service Portal. Customers will have to review their ACL configurations on the Self-Service Portal to ensure that they are correct. This does not involve updating the controller version. By default, Cisco-hosted devices are protected against the issue described in the advisory unless the customer has explicitly allowed access. For more information, see Cisco SD-WAN Cloud Hosted Controllers Provisioning.
    While these workarounds have 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.

Fixed Software

  • Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.Customers Without Service ContractsCustomers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.Fixed ReleasesCustomers are advised to upgrade to an appropriate fixed software release as indicated in the following table(s):Cisco SD-WAN vManage Software ReleaseFirst Fixed ReleaseEarlier than 20.3Migrate to a fixed release.20.3Migrate to a fixed release.20.620.6.420.7Migrate to a fixed release.20.8Migrate to a fixed release.20.920.9.1Note: It is the customer’s responsibility to upgrade their cloud controllers to the latest version in which this vulnerability is fixed.The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.

Exploitation and Public Announcements

  • The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.


  • Cisco would like to thank Orange Business for reporting this vulnerability.


Revision History