CVE-2026-83465 in Mobile Application Server
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Mobile Application Server product of Oracle E-Business Suite (component: MWA Terminal Server). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Mobile Application Server. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Mobile Application Server, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Mobile Application Server as well as unauthorized update, insert or delete access to some of Oracle Mobile Application Server accessible data. CVSS 3.1 Base Score 8.2 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The Oracle Mobile Application Server, a critical component within the Oracle E-Business Suite ecosystem, has been identified with a significant security flaw affecting versions 12.2.3 through 12.2.15. This vulnerability resides in the MWA Terminal Server module and represents a serious risk to organizational infrastructure due to its potential for remote exploitation by unauthenticated actors. The core technical issue involves an improper validation or handling of HTTP requests that allows an attacker, who possesses network access but no prior authentication credentials, to trigger severe operational disruptions within the server environment. While the immediate target is the Oracle Mobile Application Server itself, the nature of this flaw introduces a scope change in attack impact, meaning that compromising this component can lead to cascading failures or unauthorized data manipulation across other integrated products within the broader E-Business Suite architecture.
From an exploitation perspective, the vulnerability exhibits characteristics consistent with CWE-20 Improper Input Validation and potentially CWE-436 Interpretation Conflict if the issue stems from ambiguous parsing of HTTP parameters. The attack vector is classified as Network-based with Low Attack Complexity, indicating that standard web traffic can be leveraged to trigger the flaw without requiring specialized tools or complex conditions beyond basic network connectivity. However, a critical constraint in this vulnerability profile is the requirement for Human Interaction (UI:R). This suggests that the exploit likely relies on social engineering tactics, such as convincing an authorized user to click a malicious link or interact with a crafted web page hosted by the attacker. Despite this dependency, the ease of exploitation remains high once human interaction is secured, allowing unauthenticated attackers to bypass traditional perimeter defenses and gain foothold within the internal network segment hosting the Oracle infrastructure.
The operational impact of successfully exploiting this vulnerability is severe, primarily targeting system availability and data integrity rather than confidentiality in the initial phase. The primary consequence is a complete Denial of Service (DoS), where the attacker can cause the Oracle Mobile Application Server to hang or experience frequent, repeatable crashes. This effectively renders mobile application services unavailable to legitimate users, disrupting business operations that rely on real-time data access and transaction processing via mobile devices. Furthermore, beyond availability impacts, the vulnerability permits unauthorized update, insert, or delete operations against accessible server data. This integrity violation allows attackers to alter critical business records, potentially leading to financial loss, regulatory non-compliance, and erosion of trust in the system's reliability. The combination of these effects results in a CVSS 3.1 Base Score of 8.2, reflecting high severity due to the significant impact on availability and moderate impact on integrity.
In terms of threat modeling, this vulnerability aligns with ATT&CK techniques related to Initial Access via Spearphishing Link or Valid Accounts if human interaction leads to credential compromise, followed by Impact actions such as Service Stop (T1499) and Data Manipulation (T1565). The scope change aspect highlights the interconnected nature of enterprise application suites, where a weakness in one module can serve as an entry point for lateral movement or broader system compromise. Organizations must recognize that even if direct data exfiltration is not immediately evident, the ability to corrupt database records and disrupt service availability constitutes a critical breach of security objectives.
Mitigation strategies should prioritize immediate patching to the latest supported version of Oracle E-Business Suite as recommended by vendor advisories. In environments where patching cannot be implemented instantly due to operational constraints, network-level controls are essential. Implementing strict Web Application Firewall (WAF) rules can help detect and block anomalous HTTP traffic patterns associated with this exploit attempt. Additionally, restricting access to the Oracle Mobile Application Server interface to trusted IP ranges or requiring multi-factor authentication for all administrative interfaces can reduce the attack surface. Security teams should also monitor system logs for signs of service instability or unexpected database modifications that may indicate an ongoing exploitation attempt. Regular vulnerability assessments and penetration testing focused on mobile application components are crucial for maintaining a robust security posture against evolving threats targeting enterprise suites.