CVE-2026-101156 in CloudVision CUE
Summary
by MITRE • 10/06/2026
A stored cross-site scripting (XSS) vulnerability may allow an authenticated, high-privilege administrator to store malicious content in a configuration. The content may execute in another authenticated user's browser when that user views or compares the affected configuration. Successful exploitation may allow the attacker to act through the victim's authenticated browser session to access sensitive data, modify configurations, or disrupt managed wireless services.
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability described is a stored cross-site scripting flaw located within the administrative configuration interface of a network management system, likely related to wireless infrastructure given the reference to managing wireless services. This specific type of weakness falls under CWE-79, which covers Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. Unlike reflected XSS where malicious scripts are executed immediately via a crafted link, stored XSS involves persisting the payload within the application's data store, such as a database or configuration file. In this scenario, an attacker with high-privilege administrative access is able to inject malicious JavaScript code into a configuration parameter that is subsequently rendered by the web interface without proper sanitization or encoding when viewed by other users.
The operational impact of this vulnerability extends beyond simple script execution because it leverages the trust relationship between the user and the application while exploiting the elevated privileges of the initial attacker. When an authenticated, lower-privilege administrator views or compares configurations containing the malicious payload, their browser executes the injected code within the security context of the vulnerable web application. This allows the attacker to perform actions as if they were the victim user, effectively bypassing standard access controls that might otherwise restrict certain operations. The ability to act through the victim's authenticated session means that even users with lesser privileges can be manipulated into performing high-impact tasks or having their sessions hijacked for further exploitation.
The consequences of successful exploitation are severe and multifaceted. Attackers can exfiltrate sensitive data such as network topology maps, credential stores, or proprietary configuration details by sending it to an external server controlled by the attacker. Furthermore, they can modify critical configurations, potentially disrupting managed wireless services by altering channel settings, disabling security protocols like WPA3, or creating rogue access points within the infrastructure. This disruption of service poses a significant risk to organizational continuity and network integrity. Additionally, the malicious script could be used to steal session cookies or tokens, allowing for persistent unauthorized access even after the initial vulnerability is patched if sessions are not properly invalidated.
Mitigation strategies must address both the immediate technical flaw and broader security posture improvements. The primary remediation involves implementing strict input validation and output encoding on all configuration fields that are rendered in the web interface. Developers should ensure that any user-supplied data, including administrative inputs, is treated as untrusted and encoded appropriately for its context to prevent browser execution of malicious scripts. Implementing a Content Security Policy can also help mitigate the impact by restricting the sources from which scripts can be loaded or executed. Beyond technical fixes, organizations should enforce strict access controls using the principle of least privilege, ensuring that high-privilege administrative accounts are protected with multi-factor authentication and limited to essential tasks only. Regular security audits and penetration testing focused on stored XSS vectors in configuration management interfaces are recommended to identify similar weaknesses before they can be exploited. This aligns with ATT&CK technique T1059 which covers Command and Scripting Interpreter, as the executed script often serves as a vehicle for further command execution or data exfiltration within the environment.