CVE-2026-56578 in MyCloud
Summary
by MITRE • 07/21/2026
HCL MyCloud was affected by Server Version Disclosure. It may help attackers identify and exploit known vulnerabilities affecting the disclosed software versions.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/21/2026
Server version disclosure vulnerabilities represent a critical information leakage threat that significantly impacts cybersecurity posture and attack surface assessment. When HCL MyCloud systems inadvertently expose their server version information through response headers, error messages, or configuration files, they provide adversaries with precise targeting capabilities for exploiting known vulnerabilities specific to those software versions. This type of information disclosure directly aligns with CWE-200, which categorizes exposure of system information as a fundamental security weakness that enables more sophisticated attacks. The disclosed version numbers allow threat actors to quickly cross-reference against vulnerability databases such as CVE Details, NVD, or MITRE ATT&CK frameworks to identify potential exploits, patches, and attack vectors specific to the exposed software versions.
The operational impact of server version disclosure extends beyond simple information leakage, creating cascading security risks that can lead to full system compromise. When attackers obtain version information from HCL MyCloud deployments, they gain intelligence about the exact software stack in use, including operating systems, web servers, application frameworks, and middleware components. This knowledge enables them to craft targeted attacks using specific exploit kits, zero-day vulnerabilities, or well-documented exploits that have been previously discovered and catalogued by security researchers. The vulnerability creates an automated attack pathway where reconnaissance tools can systematically query exposed version information and immediately begin scanning for matching vulnerabilities in their threat databases.
Security professionals must understand that server version disclosure represents a foundational weakness that undermines defense-in-depth strategies and violates core security principles of least privilege and operational security. This issue directly relates to ATT&CK technique T1592, which describes reconnaissance activities focused on identifying system information through various means including version enumeration. The exposure creates opportunities for attackers to bypass initial security controls by focusing their efforts on known weaknesses rather than conducting broad reconnaissance. In HCL MyCloud environments, this vulnerability can enable attackers to identify outdated software components that may lack current security patches or have known backdoors and configuration flaws.
Mitigation strategies should focus on comprehensive header sanitization, error message customization, and regular security auditing of system responses. Organizations must implement strict controls over HTTP headers to prevent version information exposure, configure custom error pages that do not reveal system details, and conduct routine penetration testing to identify potential information leaks. The remediation process involves configuring web servers to suppress version strings in response headers, implementing proper logging and monitoring for unauthorized access attempts, and establishing regular vulnerability assessment procedures that include automated scanning for version disclosure issues. Additionally, security teams should deploy intrusion detection systems capable of identifying suspicious queries targeting exposed version information and maintain updated threat intelligence feeds that correlate disclosed versions with active exploit campaigns.
The long-term implications of server version disclosure vulnerabilities require continuous monitoring and proactive security measures to prevent exploitation attempts. Organizations must establish regular security assessments to identify and remediate version exposure issues across all system components, including application servers, database systems, and network infrastructure devices. This vulnerability type demonstrates the importance of comprehensive security hardening practices that address both known and unknown attack vectors while maintaining operational security through careful information management and access control policies.