Cisco Security Advisory
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:X/RL:X/RC:X
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Multiple vulnerabilities in Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow a remote attacker to gain access to sensitive information, elevate privileges, or gain unauthorized access to the application.
For more information about these vulnerabilities, see the Details section of this advisory.
Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
Cisco strongly recommends that customers upgrade to the fixed software indicated in this advisory.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-mltvnps2-JxpWm7R
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Vulnerable Products
These vulnerabilities affect Cisco Catalyst SD-WAN Manager, regardless of device configuration.
These vulnerabilities affect all deployment types, including:
- On-Prem Deployment
- Cisco SD-WAN Cloud-Pro
- Cisco SD-WAN Cloud (Cisco Managed)
- Cisco SD-WAN for Government (FedRAMP)
For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory.
Cisco strongly recommends that customers upgrade to the fixed software indicated in this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities.
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These vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit another vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerabilities.
Cisco strongly recommends that customers upgrade to the fixed software indicated in this advisory.
Details about the vulnerabilities are as follows:
CVE-2026-20224: Cisco Catalyst SD-WAN Manager XML External Entity Injection Vulnerability
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to read arbitrary files that are stored in an affected system. The attacker does not need to have valid user credentials.
This vulnerability is due to improper handling of XML External Entity (XXE) entries when parsing an XML file. An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to read arbitrary files that are stored in the affected system.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Bug ID: CSCwt55544
CVE ID: CVE-2026-20224
Security Impact Rating (SIR): Critical
CVSS Base Score: 8.6
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:NCVE-2026-20209: Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker with read-only permissions to elevate their privileges from low to high and perform actions as a high-privileged user.
This vulnerability exists because sensitive session information is recorded in audit logs. An attacker could exploit this vulnerability by elevating their read-only permissions in Cisco Catalyst SD-WAN Manager to those of a high-privileged user. A successful exploit could allow the attacker to perform actions as a high-privileged user.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Bug ID: CSCwt38739
CVE ID: CVE-2026-20209
Security Impact Rating (SIR): Medium
CVSS Base Score: 5.4
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NCVE-2026-20210: Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker with read-only permissions to modify configurations and perform unauthorized actions on an affected system.
This vulnerability exists because of a failure to redact sensitive information within device configurations and templates. An attacker could exploit this vulnerability by elevating their read-only permissions to those of a high-privileged user. A successful exploit could allow the attacker to access or modify configuration settings within Cisco Catalyst SD-WAN Manager as a high-privileged user.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Bug ID: CSCwt38767
CVE ID: CVE-2026-20210
Security Impact Rating (SIR): Medium
CVSS Base Score: 5.4
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
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There are no workarounds that address these vulnerabilities.
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Cisco considers any workarounds and mitigations (if applicable) to be temporary solutions until an upgrade to a fixed software release is available. To fully remediate these vulnerabilities and avoid future exposure as described in this advisory, Cisco strongly recommends that customers upgrade to the fixed software indicated in this advisory.
Fixed Releases
In the following table, the left column lists Cisco software releases. The right column indicates whether a release is affected by the vulnerabilities that are described in this advisory and the first release that includes the fix for these vulnerabilities. Customers are advised to upgrade to an appropriate fixed software release as indicated in this section.
Cisco Catalyst SD-WAN Release First Fixed Release Earlier than 20.91 Migrate to a fixed release. 20.9 20.9.9.1 20.10 20.12.7.1 20.111 20.12.7.1 20.12 20.12.5.4
20.12.6.2
20.12.7.120.131 20.15.5.2 20.141 20.15.5.2 20.15 20.15.4.4
20.15.5.220.161 20.18.2.2 20.18 20.18.2.2 26.1 26.1.1.1 1. These releases have reached End of Software Maintenance. Cisco strongly encourages customers to upgrade to a supported release.The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.
Cisco has also addressed this vulnerability in Cisco SD-WAN Cloud (Cisco Managed) Release 20.15.506, which is cloud based. No user action is required. Customers can determine the current remediation status or software version by using the Help function in the service GUI.
Customers who need additional information are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
Additional Information
- To check component and software release compatibility, see the Catalyst SD-WAN Control Component Compatibility Matrix.
- For help planning an upgrade, see the Cisco Catalyst SD-WAN Upgrade Matrix.
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Cisco recommends upgrading the affected systems to a fixed software release.
General Recommendations for Hardening
- Prevent access from unsecured networks, such as the internet, to the system. If internet access to the system is required, restrict system access to only known, trusted hosts on ports/protocols that are included in the user guides.
- Protect Cisco Catalyst SD-WAN Control Components behind a filtering device such as a firewall, and filter traffic to and from the systems while allowing only known, trusted hosts to send traffic to the systems. Using a two-layer firewall can provide flexibility in network planning so that end users do not connect directly to the outer DMZ. See the deployment sections of the Cisco Catalyst SD-WAN Design Guide.
- Regularly monitor log traffic for any unexpected traffic to and from systems. Logging should be sent to an external server, if possible, and kept for a long enough duration so that post-event investigations can be performed with sufficient log data.
- Disable HTTP for the Cisco Catalyst SD-WAN Manager web UI administrator portal.
- Disable any network services that are not required, including HTTP and FTP. For more information about specific service functionality, see the Cisco Catalyst SD-WAN user guides.
- Upgrade the system to the latest version of Cisco Catalyst SD-WAN Software.
- Change the default administrator password to a more secure variant. Restrict access to the administrator account by creating user accounts based on necessary access requirements. In addition, create operator accounts for all administrators.
- Use SSL/TLS, obtain an SSL certificate from a certificate authority (CA), or create a self-signed certificate.
For more information, review the Cisco Catalyst SD-WAN Hardening Guide.
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The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
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Cisco would like to thank the following people for reporting these vulnerabilities:
- Elise Imison of Computacenter: CVE-2026-20209 and CVE-2026-20210
- Khaled Alshaikh and Khalid Alharthi: CVE-2026-20224
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Initial public release. — Final 2026-MAY-14
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SOFTWARE DOWNLOADS AND TECHNICAL SUPPORT
The Cisco Support and Downloads page on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool. Please note that customers may download only software that was procured from Cisco directly or through a Cisco authorized reseller or partner and for which the license is still valid.
Customers 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 Technical Assistance Center (TAC). Customers 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.
When considering software upgrades, customers are advised to regularly consult the advisories for the relevant Cisco products 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.
LEGAL DISCLAIMER DETAILS
CISCO DOES NOT MAKE ANY EXPRESS OR IMPLIED GUARANTEES OR WARRANTIES OF ANY KIND, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, CISCO DOES NOT GUARANTEE THE ACCURACY OR COMPLETENESS OF THIS INFORMATION. THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
Copies or summaries of the information contained in this Security Advisory may lack important information or contain factual errors. Customers are advised to visit the Cisco Security Advisories page for the most recent version of this Security Advisory. The Cisco Product Security Incident Response Team (PSIRT) assesses only the affected and fixed release information that is documented in this advisory. See the Cisco Security Vulnerability Policy for more information.