CVE-2026-83355 in Enterprise Manager for Fusion Middleware
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Enterprise Manager for Fusion Middleware product of Oracle Enterprise Manager (component: Metrics). Supported versions that are affected are 13.5 and 24.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Enterprise Manager for Fusion Middleware. Successful attacks of this vulnerability can result in takeover of Oracle Enterprise Manager for Fusion Middleware. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Metrics component of Oracle Enterprise Manager for Fusion Middleware, specifically affecting versions 13.5 and 24.1. This security flaw represents a critical failure in access control mechanisms that governs how unauthenticated users interact with the application's metric collection and reporting subsystems. The core technical issue stems from an insufficient validation or authentication check within the HTTP request handling logic of the Metrics module, allowing external actors to bypass standard authorization protocols. Because the vulnerability is easily exploitable via network-accessible HTTP interfaces, it does not require any user interaction or complex social engineering tactics to trigger. An attacker with basic networking knowledge can craft specific requests that exploit this logical gap, effectively treating the application as if no authentication barrier exists for certain metric-related endpoints.
The operational impact of this vulnerability is severe due to its high severity rating and broad scope of compromise. With a CVSS 3.1 Base Score of 9.8, classified as Critical, the flaw impacts all three pillars of the CIA triad: Confidentiality, Integrity, and Availability. The vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) indicates that the attack is network-based with low complexity, requires no privileges or user interface interaction, and results in high impacts on confidentiality, integrity, and availability even when the vulnerable component does not change security scope. Successful exploitation allows an unauthenticated attacker to gain full control over Oracle Enterprise Manager for Fusion Middleware. This level of access enables the adversary to exfiltrate sensitive monitoring data, modify configuration settings that could disrupt service operations, or potentially use the compromised management console as a pivot point to attack other systems within the enterprise infrastructure monitored by this platform.
From an industry standards perspective, this vulnerability aligns with CWE-287, which describes Improper Authentication, and specifically relates to CWE-306, Missing Authentication for Critical Function. The ability of an unauthenticated actor to take over a management console is also indicative of weaknesses often associated with ATT&CK technique T1078, Valid Accounts, although in this case the account validity is bypassed entirely rather than stolen. Furthermore, the impact on availability suggests potential alignment with denial-of-service vectors if the attacker chooses to disrupt services through the compromised interface. The lack of required user interaction and low attack complexity makes this a high-risk vector for automated scanning tools and opportunistic attackers targeting exposed management interfaces.
Mitigation strategies must prioritize immediate remediation due to the critical nature of the flaw. Oracle has likely released patches or updates addressing this specific issue in subsequent releases of Enterprise Manager 13c and Fusion Middleware components. Organizations running versions 13.5 and 24.1 should apply the latest available security patches immediately after validating compatibility with their existing environment. In scenarios where patching is not immediately feasible, network-level controls are essential to reduce exposure. This includes restricting HTTP access to the Metrics component exclusively from trusted management networks using firewall rules or reverse proxy configurations that enforce IP whitelisting. Additionally, implementing Web Application Firewalls (WAF) can help detect and block anomalous request patterns associated with exploitation attempts for unauthenticated metric queries. Regular vulnerability scanning of external-facing management interfaces is also recommended to ensure no other similar misconfigurations exist within the broader Oracle Enterprise Manager deployment.