CVE-2026-83179 in Common Applications Calendar
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Common Applications Calendar product of Oracle E-Business Suite (component: Applications Calendar). Supported versions that are affected are 12.2.3-12.2.15. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Common Applications Calendar. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Common Applications Calendar accessible data as well as unauthorized access to critical data or complete access to all Oracle Common Applications Calendar accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Common Applications Calendar. CVSS 3.1 Base Score 7.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Oracle Common Applications Calendar component of Oracle E-Business Suite, specifically affecting supported versions ranging from 12.2.3 through 12.2.15. This security flaw represents a significant risk to organizations relying on this enterprise resource planning platform for scheduling and operational coordination. The core technical issue involves an insufficient input validation or access control mechanism within the HTTP interface of the Applications Calendar module. While the vulnerability is classified as difficult to exploit due to high complexity requirements, it does not require user interaction and can be triggered remotely by a low-privileged attacker who has network connectivity to the affected system. This distinction highlights that while the attack vector may demand specific conditions or precise timing, the barrier to entry for an authenticated but unprivileged user is relatively low compared to attacks requiring administrative privileges or complex social engineering tactics.
From a technical perspective, this vulnerability aligns with CWE-269, which addresses Improper Privilege Management, and potentially CWE-79 if it involves cross-site scripting elements that lead to unauthorized data manipulation, though the primary impact described points toward broader access control failures. The attacker leverages HTTP requests to interact with the calendar functionality, bypassing intended restrictions on what actions can be performed by users of lower privilege levels. This allows the adversary to execute operations that should strictly be reserved for higher-level administrators or specific authorized roles. The complexity arises from the need to navigate the application's logic correctly without triggering detection mechanisms or encountering errors that would abort the attack sequence, making it a sophisticated exploitation scenario despite the low initial access requirements.
The operational impact of this vulnerability is severe, encompassing breaches in confidentiality, integrity, and availability as reflected by its CVSS 3.1 Base Score of 7.1. Successful exploitation enables an attacker to create, delete, or modify critical data within the Oracle Common Applications Calendar. This capability directly compromises data integrity, allowing for the insertion of false appointments, deletion of essential schedules, or alteration of existing records which could disrupt business operations and supply chain logistics dependent on accurate scheduling. Furthermore, the vulnerability grants unauthorized access to sensitive information stored in the calendar system, leading to a significant confidentiality breach where private meeting details, resource allocations, or strategic planning data become exposed to malicious actors.
In addition to data compromise, the vulnerability poses a threat to service availability by enabling partial denial of service conditions. An attacker can exploit this flaw to degrade the performance or stability of the Oracle Common Applications Calendar, potentially causing system slowdowns, crashes, or unresponsiveness for legitimate users. This impacts the overall reliability of the E-Business Suite environment, forcing IT teams to divert resources toward incident response and recovery rather than maintaining normal operations. The combination of unauthorized data manipulation and service degradation creates a multifaceted threat landscape that undermines trust in the system's ability to support critical business functions reliably.
Mitigation strategies must prioritize immediate patching as recommended by Oracle Security Alerts. Organizations should apply the latest security patches for Oracle E-Business Suite versions 12.2.3 through 12.2.15 to address the underlying code flaws responsible for this privilege escalation and access control failure. In environments where patching is not immediately feasible, network segmentation strategies should be implemented to restrict HTTP access to the Applications Calendar component from untrusted networks or low-privileged user segments. Implementing strict web application firewalls with rules tailored to detect anomalous request patterns associated with calendar manipulation can provide an additional layer of defense. Continuous monitoring for unusual data changes within the calendar module and reviewing audit logs for unauthorized modification attempts are essential operational security practices to detect potential exploitation in real-time.