CVE-2025-55252: HCL AION Auth Bypass Vulnerability

CVE-2025-55252 Overview

CVE-2025-55252 is a Weak Password Policy vulnerability affecting HCL AION version 2. This security flaw allows the use of easily guessable passwords, potentially resulting in unauthorized access to the system. The vulnerability stems from insufficient password complexity requirements, which can make user accounts susceptible to brute-force attacks and credential guessing.

Critical Impact

Weak password policies can enable attackers to compromise user accounts through password guessing or brute-force attacks, potentially leading to unauthorized system access.

Affected Products

• HCL AION version 2

Discovery Timeline

• 2026-01-19 - CVE CVE-2025-55252 published to NVD
• 2026-01-19 - Last updated in NVD database

Technical Details for CVE-2025-55252

Vulnerability Analysis

This vulnerability falls under CWE-521 (Weak Password Requirements), which occurs when a product does not require users to provide sufficiently strong passwords. The weakness is categorized as a Configuration & Design Flaw related to weak password requirements.

The vulnerability requires network access to exploit but has high attack complexity. An attacker would need high privileges and user interaction to successfully exploit this weakness. The potential impact includes limited confidentiality and integrity breaches, though availability is not affected.

Root Cause

The root cause of CVE-2025-55252 lies in HCL AION version 2's password policy implementation, which fails to enforce adequate password complexity requirements. The system does not mandate sufficient password length, character diversity, or complexity rules, allowing users to set weak, easily guessable passwords that can be compromised through dictionary attacks or credential stuffing.

Attack Vector

The attack vector for this vulnerability is network-based. An attacker could potentially exploit weak passwords through:

1. Brute-force attacks: Systematically attempting password combinations against user accounts
2. Dictionary attacks: Using lists of common passwords to guess credentials
3. Credential stuffing: Using previously compromised credentials from other breaches

The vulnerability does not require local access, but exploitation difficulty is increased due to the need for elevated privileges and user interaction. For technical implementation details, refer to the HCL Software Knowledge Base Article.

Detection Methods for CVE-2025-55252

Indicators of Compromise

• Multiple failed authentication attempts against user accounts from unusual IP addresses
• Successful logins from unexpected geographic locations or at unusual times
• Account lockouts or alerts related to password brute-force attempts

Detection Strategies

• Implement monitoring for repeated failed login attempts that may indicate brute-force activity
• Review authentication logs for patterns consistent with password spraying or dictionary attacks
• Deploy Security Information and Event Management (SIEM) rules to detect credential-based attacks

Monitoring Recommendations

• Enable detailed authentication logging in HCL AION version 2
• Configure alerts for abnormal authentication patterns such as multiple failed attempts followed by success
• Monitor for lateral movement following successful authentication from suspicious sources

How to Mitigate CVE-2025-55252

Immediate Actions Required

• Review and strengthen password policies in HCL AION version 2 deployments
• Enforce minimum password length of at least 12-14 characters
• Require password complexity including uppercase, lowercase, numbers, and special characters
• Implement account lockout policies after multiple failed authentication attempts
• Consider deploying multi-factor authentication (MFA) as an additional security layer

Patch Information

Consult the HCL Software Knowledge Base Article for official guidance and any available patches or configuration updates from HCL Software to address this vulnerability.

Workarounds

• Implement organizational password policies that exceed the default HCL AION requirements
• Deploy a web application firewall (WAF) with brute-force protection capabilities
• Enable account lockout after a defined number of failed login attempts
• Implement IP-based rate limiting for authentication endpoints
• Consider using a password manager organization-wide to encourage strong, unique passwords

# Example password policy recommendations
# Minimum password length: 14 characters
# Require complexity: uppercase, lowercase, numbers, special characters
# Password history: prevent reuse of last 12 passwords
# Account lockout: 5 failed attempts, 30-minute lockout duration
# Enable MFA where possible