CVE-2021-22506: Access Manager Information Disclosure Flaw

CVE-2021-22506 Overview

CVE-2021-22506 is an Information Leakage vulnerability affecting Micro Focus Access Manager, a widely deployed identity and access management solution. The vulnerability stems from advanced configuration settings that improperly expose sensitive information, allowing unauthorized actors to access confidential data through network-based attacks without requiring authentication or user interaction.

Critical Impact

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild. Organizations running affected versions should prioritize immediate remediation.

Affected Products

• Micro Focus Access Manager versions prior to 5.0
• All previous releases of Micro Focus Access Manager
• Organizations using Access Manager for identity and access management

Discovery Timeline

• 2021-03-26 - CVE-2021-22506 published to NVD
• 2025-10-27 - Last updated in NVD database

Technical Details for CVE-2021-22506

Vulnerability Analysis

This Information Leakage vulnerability exists within the advanced configuration component of Micro Focus Access Manager. The flaw enables attackers to extract sensitive information from the application without requiring any form of authentication or privilege. The vulnerability can be exploited remotely over the network with low attack complexity, making it particularly dangerous in enterprise environments where Access Manager is deployed to protect critical identity infrastructure.

The vulnerability exclusively impacts confidentiality, allowing attackers to read sensitive data while integrity and availability remain unaffected. This characteristic suggests the vulnerability provides unauthorized read access to configuration data, credentials, or other sensitive information managed by the Access Manager platform.

Root Cause

The root cause of CVE-2021-22506 lies in improper handling of advanced configuration settings within Micro Focus Access Manager. The application fails to adequately protect sensitive configuration data, exposing it to unauthorized access. This misconfiguration allows attackers to leverage legitimate application functionality to extract information that should be protected.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no authentication, privileges, or user interaction. An attacker with network access to a vulnerable Micro Focus Access Manager instance can exploit this vulnerability remotely. The attack path involves:

1. Identifying a vulnerable Micro Focus Access Manager instance on the network
2. Accessing the advanced configuration component through network requests
3. Extracting sensitive information exposed by the improper configuration handling
4. Leveraging the leaked information for further attacks or unauthorized access

Due to the sensitive nature of this vulnerability and its active exploitation status, specific exploitation techniques are not detailed here. Technical details can be found in the Micro Focus Access Manager Release Notes.

Detection Methods for CVE-2021-22506

Indicators of Compromise

• Unusual access patterns to Access Manager configuration endpoints
• Unexpected network connections to Access Manager services from external or unauthorized sources
• Log entries indicating access to advanced configuration components by unauthenticated users
• Evidence of credential harvesting or lateral movement following Access Manager interaction

Detection Strategies

• Monitor Access Manager logs for unauthorized access attempts to configuration endpoints
• Implement network-level monitoring for anomalous traffic patterns targeting Access Manager services
• Deploy intrusion detection signatures specific to Access Manager information disclosure attempts
• Review authentication logs for evidence of credential misuse that may indicate information leakage

Monitoring Recommendations

• Enable verbose logging on Micro Focus Access Manager to capture configuration access events
• Configure SIEM alerts for Access Manager security events and configuration changes
• Implement network traffic analysis for Access Manager communication channels
• Establish baseline behavior patterns to detect anomalous Access Manager activity

How to Mitigate CVE-2021-22506

Immediate Actions Required

• Upgrade Micro Focus Access Manager to version 5.0 or later immediately
• Audit Access Manager configurations for any signs of information exposure
• Review network logs for evidence of exploitation attempts
• Rotate any credentials that may have been exposed through the vulnerability
• Implement network segmentation to limit Access Manager exposure

Patch Information

Micro Focus has addressed this vulnerability in Access Manager version 5.0. Organizations should upgrade to version 5.0 or later to remediate this vulnerability. Detailed release notes and upgrade instructions are available in the Micro Focus Access Manager 5.0 Release Notes.

Given this vulnerability's presence on the CISA Known Exploited Vulnerabilities Catalog, federal agencies and organizations following CISA guidance must prioritize patching according to binding operational directives.

Workarounds

• Restrict network access to Access Manager services using firewall rules
• Implement additional authentication layers in front of Access Manager
• Deploy web application firewalls (WAF) to filter malicious requests
• Monitor and audit all access to Access Manager configuration interfaces
• Consider temporary service isolation until patching can be completed

# Example: Restrict Access Manager access to trusted networks only
# Add firewall rules to limit exposure (adjust IPs and ports for your environment)
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP