CVE-2026-60415 in WebLogic Server
Summary
by MITRE • 08/19/2026
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 08/19/2026
The identified vulnerability resides within the core component of Oracle WebLogic Server, a widely deployed enterprise application server that facilitates Java EE applications across various industries. This specific flaw affects multiple supported versions including 12.2.1.4.0 as well as the newer 14.x and 15.x release trains. The nature of this vulnerability is characterized by its potential for remote code execution or complete system compromise, yet it presents a significant barrier to exploitation due to high complexity requirements. While the attack vector allows an unauthenticated attacker with network access to target the server via legacy protocols such as T3 and IIOP, the difficulty in successfully leveraging this flaw suggests that specific environmental configurations or rare conditions may be necessary for successful exploitation. Despite these challenges, the severity rating remains critical because a successful exploit leads directly to full administrative control over the affected system.
From a technical perspective, the vulnerability likely stems from improper validation of input data processed through the T3 and IIOP protocols. These are proprietary binary communication protocols used by WebLogic Server for internal cluster communications and remote method invocations respectively. The flaw allows an attacker who can reach these ports to bypass authentication mechanisms or trigger unintended code paths within the server core. This aligns with common weaknesses found in complex middleware software where legacy protocol handlers may not enforce strict type checking or bounds validation on incoming serialized objects. Such flaws often relate to deserialization issues or buffer handling errors that, when triggered correctly, allow arbitrary command execution under the context of the WebLogic Server process user.
The operational impact of this vulnerability is severe, as indicated by a CVSS 3.1 Base Score of 8.1 which reflects high impacts on confidentiality, integrity, and availability. An attacker who successfully exploits this flaw can take over the Oracle WebLogic Server instance completely. This means they gain the ability to read sensitive data stored or processed by applications hosted on the server, modify application logic or configuration files to maintain persistence, and disrupt services leading to denial of service conditions. The unauthenticated nature of the attack vector makes it particularly dangerous as no prior credentials are required to initiate the exploit attempt, increasing the risk profile for any instance exposed to network traffic that can reach these specific ports.
In terms of industry standard classifications, this vulnerability maps closely to CWE-20 Improper Input Validation and potentially CWE-502 Deserialization of Untrusted Data if the core issue involves malicious object construction via T3 or IIOP packets. From a tactical standpoint within the MITRE ATT&CK framework, this relates to Initial Access techniques involving Exploitation for Remote Code Execution and specifically targets services running on open ports which may fall under Discovery or Lateral Movement depending on how the compromised server is utilized post-exploit. The high complexity of exploitation suggests that while automated scanners might flag it, manual refinement by an attacker would be necessary, yet this does not mitigate the risk given the potential for widespread impact if exploited successfully in targeted attacks against organizations with less hardened environments.
Mitigation strategies must prioritize immediate patching to the latest available version provided by Oracle which addresses these core flaws. Organizations should also implement network segmentation to restrict access to T3 and IIOP ports, typically 7001 or similar default ports, limiting them strictly to trusted internal subnets where WebLogic cluster communication is required. Disabling unnecessary protocols such as IIOP if not explicitly needed for legacy integration can reduce the attack surface significantly. Additionally, deploying a web application firewall with specific rulesets designed to detect and block malformed T3 packets or known exploit signatures associated with this vulnerability provides an additional layer of defense in depth while patching efforts are underway. Regular auditing of server configurations against Oracle security best practices is essential to ensure that no other misconfigurations compound the risk posed by such core vulnerabilities.