CVE-2026-17403 in API Connect
Summary
by MITRE • 11/07/2026
IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote attacker to gain full administrative control due to the use of hard-coded credentials.
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Analysis
by VulDB Data Team • 11/07/2026
The vulnerability identified in IBM API Connect versions ranging from 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 represents a critical security failure rooted in the improper handling of authentication credentials within the application infrastructure. This flaw is classified under CWE-798, which specifically addresses the use of hard-coded credentials that cannot be changed by system administrators or users. In this context, the software ships with default administrative accounts and passwords that are embedded directly into the binary code or configuration files rather than being generated dynamically during installation or requiring user-defined input upon first login. This practice violates fundamental security principles regarding credential management and creates a persistent backdoor for malicious actors who possess knowledge of these static credentials.
From an operational perspective, the impact of this vulnerability is severe because it allows any remote attacker with network access to bypass authentication mechanisms entirely. By leveraging known default administrative usernames and passwords, an adversary can gain full control over the API Connect environment without needing to exploit complex logic errors or buffer overflow conditions. This level of access enables the attacker to modify API definitions, intercept and manipulate traffic between clients and backend services, exfiltrate sensitive data processed through the APIs, and potentially pivot into other parts of the internal network if the gateway is not properly segmented. The ease of exploitation means that automated scanning tools can rapidly identify vulnerable instances across large enterprise deployments, leading to widespread compromise in environments where default configurations are left unchanged after deployment.
This type of vulnerability aligns with several tactics within the MITRE ATT&CK framework, particularly T1078 Valid Accounts and specifically T1078.003 Default Accounts. Attackers frequently utilize these pre-configured credentials as an initial access vector because they require no specialized exploit code or social engineering efforts beyond basic reconnaissance to discover which default accounts are active in the target environment. The persistence of such vulnerabilities is often exacerbated by a lack of automated compliance checks during deployment pipelines, allowing systems with insecure defaults to remain operational for extended periods before detection and remediation occur.
Mitigation strategies must focus on immediate credential rotation and configuration hardening. Administrators should immediately change all default administrative passwords to strong, unique values that meet organizational complexity requirements. Furthermore, it is essential to disable or delete any unused default accounts entirely rather than simply changing their passwords, as this reduces the attack surface significantly. IBM has released patches for these specific versions that address the underlying configuration issues; therefore, applying the latest available updates from IBM Support is the primary remediation step. Additionally, organizations should implement network segmentation to restrict access to API management consoles and ensure that multi-factor authentication is enabled wherever supported by the platform version in use. Regular audits of default credentials using automated vulnerability scanners can help prevent recurrence in future deployments.