CVE-2026-56584 in IntelliOps Event Management
Summary
by MITRE • 07/21/2026
HCL IEM was affected with the Information disclosure nginx server. It may enable attackers to identify outdated software versions and target known vulnerabilities or publicly available exploits.
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Analysis
by VulDB Data Team • 07/21/2026
The vulnerability in HCL IEM involving information disclosure through the nginx server represents a critical security weakness that exposes system internals to potential attackers. This issue stems from the nginx web server configuration that inadvertently reveals version information and other sensitive details about the underlying infrastructure. The exposure occurs through HTTP response headers, server banners, or error messages that contain identifying information about the software stack in use.
The technical flaw manifests when the nginx server responds to client requests with metadata that includes version numbers, operating system details, or other system characteristics. This type of information disclosure creates a significant risk for attackers who can leverage these details to identify specific software versions and correlate them with known vulnerabilities. The vulnerability aligns with CWE-200 which addresses the exposure of sensitive information to an unauthorized actor, and represents a classic example of how default server configurations can create security weaknesses.
From an operational impact perspective, this information disclosure vulnerability enables attackers to conduct more targeted and effective attacks against HCL IEM systems. Once attackers identify the specific nginx version in use, they can search for known exploits, zero-day vulnerabilities, or publicly available attack tools that specifically target those versions. This intelligence allows them to bypass initial reconnaissance phases and focus their efforts on exploiting known weaknesses rather than conducting time-consuming enumeration activities.
The threat landscape is further complicated by the fact that this vulnerability enables attackers to identify outdated software components within the HCL IEM ecosystem. When combined with other reconnaissance techniques, the disclosed information can reveal a complete attack surface including potentially vulnerable plugins, modules, or dependencies that may not be immediately apparent through standard network scanning. This creates a cascading effect where a single information disclosure issue can lead to broader system compromise.
Security professionals should consider this vulnerability in relation to ATT&CK technique T1083 which covers directory and file discovery, as well as T1592 which addresses reconnaissance using multiple methods. The exposure of nginx version information directly supports these techniques by providing attackers with specific targets for their reconnaissance efforts. Organizations implementing HCL IEM should prioritize immediate remediation through server configuration changes that suppress version information in HTTP responses.
Mitigation strategies include configuring nginx to remove or obscure version information from server headers, implementing proper header sanitization, and conducting regular security audits of web server configurations. The solution involves modifying nginx configuration files to eliminate the disclosure of software versions in response headers and error messages. Additionally, organizations should implement monitoring solutions that can detect unauthorized access attempts targeting known vulnerable versions and establish automated patch management processes to ensure timely updates of all software components including the nginx server.
The broader implications of this vulnerability highlight the importance of secure default configurations and the need for regular security assessments of web application environments. Organizations must understand that seemingly minor configuration issues can create significant security risks when combined with other attack vectors, emphasizing the need for comprehensive security controls throughout the entire system architecture rather than focusing solely on perimeter defenses.