CVE-2026-6371 in LimRAD NAC
Summary
by MITRE • 07/08/2026
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Limatek System Inc. LimRAD NAC allows Stored XSS.
This issue affects LimRAD NAC: through 08072026. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 07/08/2026
Cross-site scripting vulnerabilities represent one of the most pervasive and dangerous web application security flaws, with stored XSS variants posing particularly severe risks due to their persistence and potential for widespread impact. This vulnerability in Limatek System Inc.'s LimRAD NAC platform demonstrates a critical failure in input validation and output sanitization mechanisms that allows malicious actors to inject persistent malicious scripts into the web application's response. The flaw specifically manifests during web page generation when user-supplied data is inadequately neutralized before being rendered back to other users, creating an environment where attacker-controlled content can execute within the context of legitimate user sessions.
The technical nature of this stored XSS vulnerability stems from insufficient sanitization of input parameters that are subsequently processed and displayed in web pages without proper encoding or escaping mechanisms. When users interact with the LimRAD NAC interface and submit data that contains malicious script payloads, these inputs are stored within the application's database or processing environment. During subsequent page generation cycles, the malicious content is retrieved and rendered directly into HTML output without appropriate sanitization, allowing the injected scripts to execute in the browsers of other users who view the affected pages. This represents a classic CWE-79 weakness pattern where the application fails to properly validate or escape user-controllable data before incorporating it into dynamically generated web content.
The operational impact of this vulnerability extends far beyond simple data corruption or display issues, as it provides attackers with the capability to hijack user sessions, steal sensitive information, and potentially escalate privileges within the affected system. An attacker could leverage this stored XSS flaw to establish persistent access to the NAC platform by injecting scripts that capture authentication tokens, session cookies, or other sensitive credentials. The vulnerability affects all versions of LimRAD NAC through 08072026, indicating a prolonged period during which organizations using this network access control solution remained exposed to potential exploitation. Given that network access control systems typically handle critical security functions and sensitive network infrastructure data, the implications of successful exploitation could be severe and far-reaching.
Organizations utilizing LimRAD NAC should immediately implement defensive measures including input validation at multiple layers, output encoding for all dynamic content, and comprehensive security testing of web application components. The vulnerability aligns with ATT&CK technique T1566.001 which covers social engineering via cross-site scripting attacks, emphasizing the importance of proper input sanitization as a primary defense mechanism. Security teams should also consider implementing Content Security Policies to mitigate potential exploitation impacts and establish monitoring procedures to detect unauthorized script injections within the application environment. The lack of vendor response to early disclosure attempts highlights the critical need for organizations to maintain independent security assessment capabilities and develop contingency plans for unpatched vulnerabilities in mission-critical systems.