CVE-2026-56577 in MyCloud
Summary
by MITRE • 07/21/2026
HCL MyCloud was affected with Weak Password Policy. It may increase the risk of account compromise through brute-force or credential-based attacks.
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Analysis
by VulDB Data Team • 07/21/2026
HCL MyCloud instances suffered from a critical weakness in their authentication framework manifested through an inadequate password policy implementation that significantly undermines overall security posture. This vulnerability stems from the system's failure to enforce strong password complexity requirements, minimum length constraints, or rate limiting mechanisms that would typically prevent automated attack vectors. The weak password policy creates an exploitable condition where adversaries can systematically attempt multiple credential combinations without sufficient resistance mechanisms.
The technical flaw represents a direct violation of established security best practices and aligns with CWE-521 Weak Password Requirements, where systems fail to enforce adequate password strength controls. This weakness enables attackers to leverage brute-force methodologies effectively, as the system does not implement proper account lockout mechanisms or exponential backoff strategies that would slow down automated credential testing attempts. The vulnerability operates at the authentication layer and provides a clear attack surface for credential-based assaults that can be executed with minimal technical sophistication.
Operational impact of this weakness extends beyond simple unauthorized access scenarios to encompass broader security implications including potential data breaches, lateral movement within compromised networks, and increased risk of persistent threats. Attackers exploiting this vulnerability can gain unauthorized access to user accounts, potentially leading to full system compromise where additional attack vectors such as privilege escalation or data exfiltration become viable. The weak password policy also facilitates credential stuffing attacks where previously compromised credentials from other systems can be successfully reused against MyCloud instances.
Security mitigations for this vulnerability should focus on implementing comprehensive password policy enforcement including minimum length requirements of at least 12 characters, complexity requirements that mandate uppercase, lowercase, numeric, and special character usage, along with robust account lockout mechanisms after failed authentication attempts. Organizations should deploy multi-factor authentication solutions to provide additional layers of protection beyond password-based authentication. Network-level protections including intrusion detection systems, rate limiting at the application level, and monitoring for unusual authentication patterns should be implemented. The remediation process must also include user education regarding secure password practices and regular security assessments to ensure policy compliance.
This vulnerability demonstrates alignment with several ATT&CK framework techniques including credential access methods such as brute force attacks and credential dumping, while also representing a foundational weakness that enables subsequent attack phases. The impact of inadequate password policies extends into the broader threat landscape where attackers increasingly rely on automated tools and compromised credentials to gain initial access to systems. Organizations implementing HCL MyCloud solutions must prioritize this vulnerability remediation as part of their overall security strategy to prevent exploitation by both automated tools and skilled adversaries who routinely target weak authentication mechanisms as primary attack vectors.