CVE-2026-83030 in Managed File Transfer
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Managed File Transfer product of Oracle Fusion Middleware (component: MFT Runtime Server). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via T3, IIOP to compromise Oracle Managed File Transfer. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Managed File Transfer accessible data as well as unauthorized read access to a subset of Oracle Managed File Transfer accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Managed File Transfer. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H).
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Oracle Managed File Transfer product, specifically affecting the MFT Runtime Server component of Oracle Fusion Middleware versions 12.2.1.4.0 and 14.1.2.0. This security flaw is characterized by its susceptibility to exploitation by low-privileged attackers who possess network access through either the T3 or IIOP protocols. The presence of this vulnerability indicates a significant weakness in how the runtime server processes incoming requests over these specific communication channels, allowing an adversary with minimal initial privileges to escalate their influence within the system environment.
From a technical perspective, the flaw enables unauthorized operations that compromise the core security pillars of confidentiality, integrity, and availability. An attacker leveraging this vulnerability can execute commands or manipulate data structures in ways not intended by the application logic. This leads to the ability to create, delete, or modify critical data stored within the Oracle Managed File Transfer system. Furthermore, the flaw permits unauthorized read access to a subset of accessible data, exposing sensitive information that should remain restricted to authorized personnel only. The technical mechanism likely involves improper validation or handling of input parameters sent via T3 or IIOP, which are commonly used for remote method invocation and object serialization in Java-based enterprise applications like Oracle Fusion Middleware.
The operational impact of this vulnerability is severe, as reflected by the CVSS 3.1 Base Score of 8.3, classified as High severity. The high integrity and availability scores indicate that successful exploitation can lead to substantial data tampering or complete service disruption. Attackers can cause a hang or frequently repeatable crash of the Oracle Managed File Transfer application, resulting in a Denial of Service condition that halts business operations dependent on file transfer services. Additionally, the ability to modify critical data poses a direct threat to organizational integrity, potentially leading to corrupted records, lost transactions, or compromised audit trails. The unauthorized read access further exacerbates the risk by facilitating potential data exfiltration campaigns against sensitive corporate information.
In terms of industry standard classifications, this vulnerability aligns with CWE-20 Improper Input Validation and CWE-78 OS Command Injection if command execution is involved, though it primarily manifests as a privilege escalation leading to unauthorized access. The attack vector corresponds to ATT&CK technique T1190 Exploit Public-Facing Application, specifically targeting the application layer through network protocols like IIOP or proprietary RMI ports such as those used by T3. The low privileges required for exploitation highlight a failure in implementing proper role-based access control checks before processing sensitive operations within the runtime server.
Mitigation strategies must prioritize immediate patching to the latest available version of Oracle Fusion Middleware that addresses this specific flaw, following Oracle Critical Patch Update recommendations. Organizations should also implement network segmentation to restrict access to T3 and IIOP ports from untrusted networks or external internet sources. Enforcing strict authentication mechanisms and ensuring that only authorized administrative accounts can interact with these protocols is essential. Additionally, deploying Web Application Firewalls configured to detect anomalous patterns in RMI or IIOP traffic can provide an additional layer of defense against exploitation attempts while patching efforts are underway. Regular vulnerability scanning focused on middleware components will help identify similar misconfigurations before they can be leveraged by adversaries.