CVE-2026-83060 in Internet Directory
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Internet Directory product of Oracle Fusion Middleware (component: OID LDAP Server). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via LDAP to compromise Oracle Internet Directory. Successful attacks of this vulnerability can result in takeover of Oracle Internet Directory. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 09/16/2026
The Oracle Internet Directory component of the Oracle Fusion Middleware suite contains a critical security flaw within its LDAP server implementation, specifically affecting versions 12.2.1.4.0 and 14.1.2.1.0. This vulnerability represents a severe risk to organizational infrastructure as it permits unauthenticated attackers with network access via the Lightweight Directory Access Protocol to compromise the integrity of the directory service. The presence of this flaw indicates a fundamental failure in input validation or authentication mechanisms within the LDAP server, allowing malicious actors to bypass standard security controls and execute arbitrary operations without valid credentials.
From a technical perspective, the vulnerability is characterized by its ease of exploitation and lack of required prerequisites for an attacker. Because no prior authentication is needed, any entity capable of reaching the Oracle Internet Directory over the network can attempt to exploit this flaw. The attack vector leverages standard LDAP communication channels, which are often permitted through firewalls in enterprise environments under the assumption that directory services require strict access controls at the application layer rather than relying solely on network segmentation. This misconfiguration or software defect allows an attacker to interact directly with the core authentication and authorization logic of the system, potentially manipulating internal data structures or executing commands within the context of the service account running the LDAP server process.
The operational impact of this vulnerability is catastrophic for organizations relying on Oracle Internet Directory as a central identity store. A successful exploitation leads to complete takeover of the directory service, which effectively grants an attacker administrative control over all identities and access policies managed by the system. This aligns with high-severity classifications such as CVSS 3.1 Base Score 9.8, reflecting maximum impacts on Confidentiality, Integrity, and Availability. In practical terms, this means attackers can exfiltrate sensitive user credentials, modify authorization rules to grant themselves elevated privileges across connected applications, or disrupt service availability by corrupting directory data. The ability to take over the Oracle Internet Directory often serves as a pivot point for broader network compromise, enabling lateral movement into other systems that trust these compromised identities.
This vulnerability maps directly to Common Weakness Enumeration categories such as CWE-287 Improper Authentication and CWE-94 Improper Control of Generation of Code Command Injection if code execution is involved, depending on the specific exploit mechanism. In terms of the MITRE ATT&CK framework, this behavior corresponds to techniques involving Initial Access via valid accounts or credentials obtained through exploitation, followed by Privilege Escalation within the directory service itself. Attackers may utilize tools like ldapsearch or custom scripts crafted with libraries such as python-ldap to probe for and exploit this weakness remotely. The high availability impact also suggests potential denial-of-service capabilities if the vulnerability allows for resource exhaustion or state corruption that crashes the LDAP server process.
Mitigation strategies must prioritize immediate remediation due to the unauthenticated nature of the attack vector. Organizations should apply the latest security patches provided by Oracle for versions 12.2.1.4.0 and 14.1.2.1.0 as soon as they are available, ensuring that all instances of Oracle Internet Directory in production environments are updated to a fixed version where input validation and authentication checks have been strengthened. In the interim, network-level controls should be implemented to restrict access to LDAP ports exclusively from trusted application servers or management networks using firewall rules or Access Control Lists. Additionally, enabling strict logging for LDAP operations can help detect anomalous connection patterns indicative of exploitation attempts. Regular audits of directory permissions and adherence to least-privilege principles will further reduce the blast radius if a compromise occurs, ensuring that even with directory takeover, lateral movement remains constrained by robust identity governance policies.