CVE-2026-111283 in Helix Network Management
Summary
by MITRE • 10/16/2026
BMC Helix Network Management on-prem before 26.3.01 contains an authentication bypass vulnerability that allows unauthenticated attackers to log in as the local administrator with any password when SAML single sign-on is configured. Attackers can submit the administrator username with an arbitrary password on the web login page to obtain a SuperAdmin session, modify device credentials, run device commands, and alter audit records.
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Analysis
by VulDB Data Team • 10/16/2026
The vulnerability identified in BMC Helix Network Management versions prior to 26.3.01 represents a critical authentication bypass flaw that fundamentally undermines the security posture of on-premises deployments where Single Sign-On via SAML is enabled. This issue stems from an improper validation mechanism within the application's login handler, which fails to correctly enforce credential verification when routing requests through the configured identity provider integration. Specifically, the system allows an attacker to submit a request for the local administrator account using any arbitrary password string on the web-based management interface. Instead of rejecting this invalid authentication attempt or redirecting it strictly to the SAML assertion validation process without fallback options, the application erroneously grants access based solely on the presence of valid-looking session tokens or misinterpreted state flags associated with the administrative role. This logic error effectively neutralizes the requirement for a correct password, allowing unauthenticated actors to escalate their privileges directly to SuperAdmin status.
From an operational impact perspective, this vulnerability is severe because it provides full control over the network management infrastructure without any prior authentication credentials. Once an attacker obtains a SuperAdmin session through this bypass, they can perform destructive and stealthy actions that compromise both confidentiality and integrity of the managed environment. The ability to modify device credentials allows adversaries to lock out legitimate administrators or establish persistent backdoor access on critical network devices such as routers, switches, and firewalls. Furthermore, the capability to run arbitrary device commands enables direct manipulation of network configurations, potentially leading to service disruptions, traffic interception, or lateral movement within the enterprise network. The ability to alter audit records is particularly concerning as it facilitates anti-forensics activities, allowing attackers to cover their tracks and evade detection by security monitoring systems that rely on these logs for incident response.
This vulnerability aligns with CWE-287, which describes Improper Authentication, specifically illustrating a failure in the verification of credentials during an authentication process. It also maps closely to MITRE ATT&CK technique T1078, Valid Accounts, as it involves the exploitation of legitimate administrative accounts through bypass mechanisms rather than credential theft or brute force. The scenario reflects common pitfalls in hybrid authentication architectures where local fallbacks are not strictly isolated from external identity provider flows. When SAML is configured, administrators often assume that all access control decisions are delegated to the IdP; however, this flaw demonstrates that if the application layer retains independent administrative entry points with flawed logic, those endpoints can be exploited independently of the central authentication service's integrity.
Mitigation strategies must prioritize immediate patching to version 26.3.01 or later where this logical error has been corrected by enforcing strict credential validation regardless of the SAML configuration state. In environments where patching is not immediately feasible, network segmentation should be implemented to restrict access to the BMC Helix Network Management web interface exclusively from trusted management subnets using firewalls and zero-trust principles. Additionally, organizations should review their authentication configurations to ensure that local administrative accounts are disabled or heavily restricted when SAML single sign-on is active, thereby removing the attack surface associated with this specific bypass vector. Continuous monitoring of audit logs for anomalies in login patterns can also help detect exploitation attempts, although the ability to alter these records necessitates robust external log shipping and integrity verification mechanisms independent of the compromised application.