CVE-2025-36421 in Controller
Summary
by MITRE • 09/18/2026
IBM Controller 11.0.0 through 11.0.1 FP7, and 11.1.0 through 11.1.3 FP1 transmits data in clear text that could allow an attacker to obtain sensitive information using man in the middle techniques.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 09/18/2026
The vulnerability identified within IBM Controller versions ranging from 11.0.0 through 11.0.1 Fix Pack 7, and 11.1.0 through 11.1.3 Fix Pack 1, represents a critical failure in data transmission security protocols. This flaw is characterized by the application's tendency to transmit sensitive information over network connections without employing adequate encryption mechanisms. In modern enterprise environments where IBM Controller serves as a central component for business process automation and workflow management, such unencrypted communication channels expose a wide array of operational data to potential interception. The absence of transport layer security means that any data packet traversing the network between the client interface and the server backend remains in plaintext format, rendering it readable by any entity capable of monitoring network traffic within the same broadcast domain or routing path.
From a technical perspective, this deficiency aligns with CWE-319, which classifies cleartext transmission of sensitive information as a significant weakness. The root cause lies in the configuration or implementation of the communication layer where legacy protocols or default settings are utilized without enforcing secure alternatives such as TLS 1.2 or higher. When an attacker positions themselves within the network path between the client and the IBM Controller server, they can employ man-in-the-middle techniques to passively sniff these transmissions. This capability allows for the extraction of credentials, session tokens, configuration details, and potentially proprietary business logic embedded in workflow definitions. The vulnerability is particularly dangerous because it does not require active exploitation or complex attack vectors; passive network monitoring tools are sufficient to capture the unencrypted payloads, making detection by traditional intrusion prevention systems difficult unless deep packet inspection with decryption capabilities is deployed.
The operational impact of this vulnerability extends beyond simple data leakage. If an attacker successfully intercepts authentication credentials, they can perform unauthorized access to the IBM Controller environment, potentially leading to further exploitation such as privilege escalation or remote code execution depending on other existing vulnerabilities in the system. Furthermore, the exposure of configuration settings and workflow structures could allow adversaries to understand the organization's operational processes, facilitating targeted social engineering attacks or more sophisticated lateral movement within the network. The integrity of business operations is compromised because attackers may not only read data but also potentially modify it if they can inject packets into the unencrypted stream, although this typically requires additional vulnerabilities in the application logic itself.
To mitigate this risk, organizations must immediately enforce encryption for all communications involving IBM Controller components. This involves configuring the server and client interfaces to require TLS connections with strong cipher suites and valid certificates issued by a trusted internal or public certificate authority. Administrators should disable any legacy protocols such as HTTP or unencrypted FTP that might be enabled by default in older versions of the software. Additionally, network segmentation strategies should be reviewed to ensure that IBM Controller traffic is isolated within secure zones where access is strictly controlled. Regular vulnerability assessments and penetration testing focused on transport layer security are recommended to verify that no plaintext channels remain open. Compliance with industry standards such as PCI DSS or HIPAA, which mandate encryption of sensitive data in transit, further underscores the necessity of addressing this flaw promptly to maintain regulatory compliance and protect organizational assets from interception-based attacks categorized under MITRE ATT&CK technique T1048, specifically Exfiltration Over Alternative Protocol.