CVE-2026-83465

Unauthenticated HTTP Exploit Causes Denial of Service and Data Modification in Oracle Mobile Application Server

Published Sep 15, 2026 CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Description
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).

Analysis

AI-generated

Technical impact

The Oracle Mobile Application Server contains a flaw in its MWA Terminal Server component that can be triggered by unauthenticated HTTP requests. Successful exploitation requires the presence of a human user other than the attacker to interact with the system, such as initiating a session or responding to a prompt, after which the attacker can cause a forced crash or complete denial of service and gain unauthorized ability to update or delete data exposed by the server. The weakness is described by CWE-400, indicating improper resource management that can be exploited to perform denial of service or unauthorized data modifications.

Affected Systems

Oracle Mobile Application Server versions 12.2.3 through 12.2.15, distributed with Oracle E‑Business Suite, are impacted. These versions remain in active production use in many organizations.

Risk and Exploitability

The CVSS 3.1 Base Score of 8.2 indicates high severity, reflecting low attack complexity, no required privileges, and the need for user interaction from a third party. The EPSS score of less than 1% points to a very low probability of exploitation in the wild, and the flaw is not listed in CISA’s KEV catalog. Nevertheless, because the flaw can be triggered via unauthenticated HTTP requests and can result in critical availability and integrity losses, exposed servers that are not patched remain at high risk.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the Oracle patch referenced in the Oracle Security Alert CSPUSEP2026 that fixes the flaw in the MWA Terminal Server component.
  • Restrict inbound HTTP access to the MWA Terminal Server to trusted networks or enforce authentication through a reverse proxy.
  • Enable detailed application and system logging to capture abnormal termination events and unauthorized data modification attempts for timely incident response.

Generated by OpenCVE AI on September 22, 2026 at 00:53 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Title Unauthenticated HTTP Exploit Causes Denial of Service and Data Modification in Oracle Mobile Application Server
Type Values Removed Values Added
Title Unauthenticated HTTP Exploit of Oracle Mobile Application Server Causing DoS and Alteration of Accessible Data
Weaknesses CWE-20
CWE-284
CWE-399
Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Unauthenticated HTTP Exploit of Oracle Mobile Application Server Causing DoS and Alteration of Accessible Data
Weaknesses CWE-20
CWE-284
CWE-399
Type Values Removed Values Added
Title Unauthenticated HTTP Attack Enables Denial of Service and Data Modification in Oracle Mobile Application Server
Weaknesses CWE-284
CWE-639
Type Values Removed Values Added
Title Unauthenticated HTTP Attack Enables Denial of Service and Data Modification in Oracle Mobile Application Server
Weaknesses CWE-284
CWE-639
Type Values Removed Values Added
Description 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).
First Time appeared Oracle
Oracle mobile Application Server
CPEs cpe:2.3:a:oracle:mobile_application_server:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle mobile Application Server
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:H'}

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

Sources

Status
PUBLISHED
Assigner
oracle
Published
Updated
Sep 21, 2026, 7:21 PM
Reserved
Aug 31, 2026, 3:40 PM
Status
Analyzed
Published
Sep 15, 2026, 8:18 PM
Modified
Oct 9, 2026, 3:15 PM