Cisco Security Advisory
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CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:X/RL:X/RC:X
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A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.
This vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This file could later be used to elevate to root. To exploit this vulnerability, the attacker must have valid credentials with at least write access.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ
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Vulnerable Products
At the time of publication, this vulnerability affected Cisco Catalyst SD-WAN Manager, regardless of device configuration.
This vulnerability affects 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 were vulnerable at the time of publication, see the Fixed Software section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
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 this vulnerability.
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Cisco Catalyst SD-WAN Manager systems that are exposed to the internet and that have ports exposed to the internet are at risk of exposure to compromise. In some instances, these indicators of compromise may occur during standard operations. Therefore, they must be assessed against normal network posture to identify and avoid false positives.
Customers are encouraged to audit the following entries from their respective log files:
The following entry from the vmanage-server.log file, located at /var/log/nms, indicates a suspicious WAR file upload, which could be an initial compromise vector:
11-June-2026 03:53:37,310 EDT INFO [a66cdc5f-807d-4c23-944e-5c809a2ece6b] [server] [SdraAnyConnectFileUploadHandler] (default task-40704) |default| uploaded Remote Access Anyconnect profile file: ../../../../var/lib/wildfly/standalone/deployments/suspicious.war to vManage.
The following two logs represent follow-on activities related to this vulnerability that may be visible in logs but are not always observed. Their presence provides insight into what an attacker can do after initial compromise, such as deploy malicious code and interact with it, even though these activities might not consistently appear in every incident log. This combined understanding helps customers recognize potential post-exploit behavior when auditing their environments.
From the vmanage-appserver.log file, located at /var/log/nms/:
11-June-2026 07:52:55,275 UTC INFO [server] (DeploymentScanner-threads - 2) WFLYSRV0010: Deployed "suspicious.war" (runtime-name : "suspicious.war")
From the serviceproxy-access.log file, located at /var/log/nms/containers/service-proxy/:
[2026-06-11T07:57:33.635Z] "POST /suspicious/index.jsp HTTP/1.1" 200 - 267 76 17 - "1.1.1.54" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0" "d7336b83-422b-4000-93e1-0296f102bbed" "1.1.1.4:8443" "127.0.0.1:8080"
Note: This activity is restricted to internal system file management within the vManage (Catalyst SD-WAN Manager) environment. It does not correlate to, nor does it affect, the operational state, configuration, or connectivity of the SD-WAN Remote Access (SDRA) feature. Customers who observe these logs and are uncertain about their origin or intent should contact the Cisco Technical Assistance Center (TAC) for further assistance.
For help determining if a Cisco Catalyst SD-WAN Manager has been compromised, customers may open a case with the Cisco TAC. Before opening a new Cisco TAC case, customers are encouraged to use the request admin-tech command from each of the control components in the SD-WAN deployment so that the admin-tech file can be provided to the Cisco TAC for review.
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There are no workarounds that address this vulnerability.
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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 this vulnerability 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
At the time of publication, the release information in the following table was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability that is described in this advisory and which release included the fix for this vulnerability.
Cisco Catalyst SD-WAN Release First Fixed Release 20.9.9.1 and earlier 20.9.9.2 20.12.7.1 and earlier 20.12.7.2 20.15.4.4 and earlier 20.15.4.5 20.15.5.2 and earlier 20.15.5.3 20.18.3 20.18.3.1 26.1.1.1 and earlier 26.1.1.2 The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.
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In June 2026, the Cisco PSIRT became aware of limited exploitation of this vulnerability. Cisco continues to strongly recommend that customers upgrade to a fixed software release to remediate this vulnerability.
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This vulnerability was found during internal security testing.
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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 1.1 Specified write access privilege in Summary. Added context to Indicators of Compromise. Summary and Indicators of Compromise Final 2026-JUN-15 1.0 Initial public release. — Final 2026-JUN-15
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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.