CVE-2026-102258 in SMA1000
Summary
by MITRE • 10/07/2026
Post-authentication Stored Cross-Site Scripting (XSS) vulnerability has been identified in the SMA1000 Appliance Management Console (AMC) which in specific conditions could potentially enable a remote authenticated attacker as administrator to store and potentially execute arbitrary JavaScript code in the Appliance Management Console (AMC).
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Analysis
by VulDB Data Team • 10/07/2026
The identification of a post-authentication stored cross-site scripting vulnerability within the SMA1000 Appliance Management Console represents a significant security risk that undermines the integrity of administrative interfaces. This specific flaw allows an attacker who has already obtained valid administrator credentials to inject malicious JavaScript code into persistent storage mechanisms managed by the console. Unlike reflected XSS, where payloads are delivered via URLs or form submissions and executed immediately without being saved, stored XSS persists on the server side. In this context, the SMA1000 AMC fails to adequately sanitize user-supplied input before storing it in its backend database or configuration files. Consequently, when any administrative user subsequently accesses a page that renders this unsanitized data, the malicious script executes within their browser session under the same privileges as the attacker who injected it. This mechanism effectively transforms the vulnerability from an isolated incident into a persistent threat vector that can affect multiple users over time.
From a technical perspective, the core issue lies in insufficient input validation and output encoding practices during the processing of administrative configuration data or log entries within the AMC interface. The application likely accepts special characters such as angle brackets, quotes, and ampersands without proper context-aware escaping when these inputs are written to persistent storage. This oversight permits the injection of executable JavaScript payloads that can interact with the Document Object Model of the management console. Because the vulnerability requires authentication at the administrator level, it is classified under CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The specific subtype here aligns with CWE-836 Use of Password-only Authentication if we consider that the attacker leverages compromised credentials to gain initial access, but more accurately, it falls under CWE-200 Exposure of Sensitive Information to an Unauthorized Actor when considering the potential data exfiltration capabilities enabled by the script execution.
The operational impact of this vulnerability is severe due to its post-authentication nature and high privilege level. An attacker with administrator rights can exploit this flaw to perform actions that compromise the entire management infrastructure. By executing arbitrary JavaScript, the adversary can steal session cookies or authentication tokens associated with other administrative users who view the compromised page. This facilitates account hijacking, allowing the attacker to impersonate legitimate administrators without needing their passwords further. Furthermore, the malicious script can manipulate the user interface of the AMC to display false information, tricking administrators into performing unintended actions such as changing network configurations, disabling security features, or deploying unauthorized firmware updates. In a worst-case scenario, the attacker could use the compromised administrative session to pivot deeper into the internal network, using the SMA1000 appliance as a foothold for lateral movement and further exploitation of connected systems.
This vulnerability maps directly to several techniques within the MITRE ATT&CK framework, reflecting real-world adversary behaviors. The initial access phase is covered by T1078 Valid Accounts, specifically T1078.004 Cloud Accounts or local administrative accounts depending on deployment context. Once inside, the exploitation of stored XSS aligns with T1059 Command and Scripting Interpreter, particularly JavaScript execution within a browser environment. The ability to steal credentials correlates with T1539 Steal Web Session Cookie, while manipulating the interface for unintended actions relates to T1482 Domain Controller Discovery or broader configuration changes under T1562 Impair Defenses if security settings are altered. These mappings highlight that this is not merely a code defect but a critical pathway for advanced persistent threats seeking long-term access and control over network infrastructure components.
Mitigation strategies must address both the immediate technical flaw and the procedural aspects of administrative access management. The primary remediation involves applying vendor-provided patches or updates that enforce strict input validation and output encoding on all fields within the SMA1000 AMC that accept user input for storage. Developers should implement a whitelist approach for allowed characters in configuration parameters rather than relying solely on blacklist filters, which are prone to bypasses using encoded variants of malicious payloads. Additionally, implementing Content Security Policy headers can mitigate the impact by restricting the sources from which scripts can be loaded and executed within the browser context. Beyond technical fixes, organizations should enforce multi-factor authentication for all administrative accounts to reduce the risk of credential compromise leading to this vulnerability's exploitation. Regular auditing of admin activity logs is also recommended to detect any anomalous behavior indicative of stored XSS payloads being injected or accessed by unauthorized parties.