Cisco Security Advisory
Remote Code Execution Vulnerability in React and Next.js Frameworks: December 2025
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
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On December 3, 2025, the React team released a security advisory regarding a vulnerability, CVE-2025-55182, in the React server that could allow an unauthenticated, remote attacker to perform remote code execution on an affected device or system.
For a description of this vulnerability, see the public React Security Advisory.
Cisco's standard practice is to update integrated third-party software components to later versions as they become available.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-react-flight-TYw32Ddb
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Any Cisco product or service that is not explicitly listed in the Affected Products section of this advisory is not affected by the vulnerability or vulnerabilities described. Be aware that products that are currently considered not vulnerable may subsequently be considered vulnerable as additional information becomes available.
Vulnerable Products
Cisco investigated its product line to determine which products may be affected by this vulnerability.
Products Confirmed Not Vulnerable
Cisco investigated its product line to determine which products may be affected by this vulnerability.
Any product or cloud service not listed in the Products Confirmed Not Vulnerable or Vulnerable Products section of this advisory is to be considered not vulnerable.
Cisco has confirmed that this vulnerability does not affect the following Cisco products:
- Cisco Application Centric Infrastructure (ACI)
- Cisco Finesse
Cisco has confirmed that this vulnerability does not affect the following Cisco cloud offerings:
- AI Cloud
- AppDynamics
- Business Critical Insights
- Catalyst SD-WAN
- Cloud Connected Unified Communication
- CWAY Cloud
- Crosswork Cloud
- Defense Orchestrator
- DevNet, developer.cisco.com
- DevNet Sandbox
- eSIM Flex
- Intersight
- IoT Control Center
- IoT Operations Dashboard
- ISE Tools
- Isovalent
- Managed Services Accelerator
- Managed Services Platform
- Meraki/Network Platform Dashboard
- Mobility Mobile Services Core, formerly WG2
- Multicloud Defense
- Network Based Application Recognition
- Network Plug and Play Connect, devicehelper.cisco.com
- Private 5G as a Service
- Provider Connectivity Assurance
- Secure Access
- Secure Cloud Analytics
- Secure Cloud Insights
- Secure Email Cloud Gateway
- Secure Email Encryption Service
- Secure Endpoint
- Secure Malware Analytics
- Slido
- Smart License
- Smartlook
- Spaces
- Splunk Cloud
- ThousandEyes
- UC Management - Webex Calling Dedicated Instance
- Unified Communication Manager Cloud
- Vidcast
- Vulnerability Management, formerly Kenna Security
- Webex Calling
- Webex Calling Dedicated Instance
- Webex Campaign
- Webex Connect
- Webex Contact Center
- Webex Contact Center Enterprise
- Webex Experience Management
- Webex Events
- Webex Interact
- Webex Meetings
- Webex Messaging
- Webex Notify
- Webex Suite
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There are no workarounds that address this vulnerability.
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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 1.6 Updated the products confirmed not vulnerable list and summary section. Summary and Products Confirmed Not Vulnerable Final 2025-DEC-17 1.5 Updated the products confirmed not vulnerable list. Revised wording regarding investigation. Summary and Affected Products Interim 2025-DEC-11 1.4 Updated the products confirmed not vulnerable list. Products Confirmed Not Vulnerable Interim 2025-DEC-10 1.3 Updated the products confirmed not vulnerable list. Products Confirmed Not Vulnerable Interim 2025-DEC-08 1.2 Updated the products confirmed not vulnerable list. Products Confirmed Not Vulnerable Interim 2025-DEC-06 1.1 Added list of products confirmed not vulnerable. Products Confirmed Not Vulnerable Interim 2025-DEC-05 1.0 Initial public release. - Interim 2025-DEC-04
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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.