CVE-2026-89068 in MOVEit Transfer
Summary
by MITRE • 10/14/2026
Missing critical step in authentication vulnerability in Progress MOVEit Transfer (LDAP module).
This issue affects MOVEit Transfer: before 2025.1.6 and from 2026.0.0 before 2026.0.4.
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Analysis
by VulDB Data Team • 10/14/2026
The identified vulnerability resides within the Lightweight Directory Access Protocol authentication subsystem of Progress MOVEit Transfer, a widely deployed file transfer solution used by enterprises for secure data exchange. This specific flaw represents a critical failure in the logical flow of the authentication process, where a necessary validation step is omitted during the verification of user credentials against an external LDAP directory service. In standard operational contexts, when a user attempts to log in via LDAP integration, the application must not only verify that the provided username and password match existing records but also ensure that the associated account meets all active security policies, such as checking for disabled status, expiration dates, or specific group membership requirements before granting access. The absence of this critical step allows an attacker who possesses valid credentials to bypass these additional administrative controls, effectively treating a restricted or deactivated account as fully authorized and accessible.
From a technical perspective, the root cause is classified under CWE-287, which denotes Improper Authentication, specifically relating to missing authentication checks for critical functions within the application logic. The vulnerability exploits the gap between initial credential validation and final session establishment. When an attacker submits valid credentials that correspond to an LDAP entry marked as disabled or otherwise restricted by organizational policy, the MOVEit Transfer server proceeds with the login sequence without re-evaluating these constraints. This logical bypass is particularly dangerous because it undermines the principle of least privilege and allows for unauthorized access using legitimate but compromised or misconfigured accounts. The flaw does not require complex exploitation techniques; rather, it relies on the simple act of authenticating with credentials that should logically be rejected by the system's security policy enforcement layer.
The operational impact of this vulnerability is severe, as it directly compromises the confidentiality and integrity of data managed through MOVEit Transfer. Attackers can gain unauthorized access to sensitive files, exfiltrate proprietary information, or manipulate transfer jobs using accounts that administrators intended to restrict or disable for security reasons. This could lead to significant regulatory non-compliance, particularly in industries governed by standards such as GDPR, HIPAA, or PCI-DSS, where strict access controls are mandatory. Furthermore, the ability to bypass account restrictions facilitates lateral movement within an organization’s network if the compromised LDAP accounts have privileges on other systems connected via similar authentication mechanisms. The attacker can operate with a false sense of legitimacy, making detection through standard audit logs more challenging since the login appears successful and authorized by default system behaviors.
In terms of threat modeling, this vulnerability aligns with MITRE ATT&CK technique T1078, Valid Accounts, specifically in scenarios where attackers leverage existing but restricted credentials to maintain persistence or escalate privileges without triggering alerts associated with brute-force attacks or credential stuffing. The lack of proper validation means that security monitoring tools relying on authentication failure metrics may fail to detect this intrusion vector, as the system registers a successful login event despite the policy violation. This creates a blind spot in defensive postures that rely heavily on standard access control lists and account status flags for threat detection.
To mitigate this risk, organizations must immediately apply the vendor-recommended patches for MOVEit Transfer versions prior to 2025.1.6 and between 2026.0.0 and 2026.0.4. Until patching is complete, administrators should implement compensating controls such as enforcing multi-factor authentication for all LDAP-integrated users, which adds a second layer of verification independent of the password-based logic flaw. Additionally, reviewing and tightening LDAP group mappings can help limit the scope of potential access. It is also advisable to enhance logging configurations to capture detailed audit trails of authentication attempts, including those that succeed but involve restricted accounts, allowing security operations centers to identify anomalous activity patterns indicative of this specific bypass technique. Regular audits of user account statuses and permissions are essential to ensure that disabled or limited accounts do not retain unintended access privileges through any remaining integration points.