CVE-2026-62603 in Hyperion Calculation Manager
Summary
by MITRE • 08/19/2026
Vulnerability in the Oracle Hyperion Calculation Manager product of Oracle Hyperion (component: Security). The supported version that is affected is 11.2.25.0.000. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Oracle Hyperion Calculation Manager executes to compromise Oracle Hyperion Calculation Manager. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Hyperion Calculation Manager accessible data as well as unauthorized read access to a subset of Oracle Hyperion Calculation Manager accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/19/2026
The identified vulnerability resides within the Security component of Oracle Hyperion Calculation Manager, specifically affecting version 11.2.25.0.000 and potentially other supported releases in that lineage. This flaw represents a critical security deficiency where the application fails to properly enforce authentication or access controls for certain operations when accessed from specific network contexts. The core technical issue involves an insufficient validation of user credentials or session tokens, allowing unauthenticated entities to interact with sensitive backend functions. Because the vulnerability is tied to the physical communication segment attached to the hardware executing the service, it implies that the attack vector requires local network access rather than remote internet-based exploitation. This distinction significantly narrows the scope of potential attackers but does not diminish the severity for organizations where internal networks are considered trusted or poorly segmented.
From a technical perspective, this vulnerability aligns with CWE-287, which describes Improper Authentication, and potentially CWE-306, Missing Authentication for Critical Function. The attacker exploits the lack of mandatory authentication checks on specific API endpoints or administrative interfaces exposed by the Calculation Manager service. By leveraging their position on the same physical network segment as the target server, an adversary can send crafted requests that bypass security controls designed to restrict access to authenticated users only. This allows the manipulation of data integrity and confidentiality without prior login credentials. The simplicity of this attack vector means it requires minimal effort or specialized tools, relying instead on standard networking capabilities and knowledge of the application's internal structure.
The operational impact of a successful exploitation is substantial for organizations relying on Oracle Hyperion for financial planning and analysis. An unauthenticated attacker can achieve unauthorized read access to a subset of accessible data, leading to potential exposure of sensitive financial models, budgets, or strategic plans. This constitutes a direct breach of confidentiality as defined in the CVSS scoring model. Furthermore, the ability to perform unauthorized updates, inserts, or deletes compromises the integrity of the system's data store. Attackers could alter critical calculation parameters, delete essential configuration settings, or inject malicious logic into financial models. Such actions can lead to significant financial loss, regulatory non-compliance due to inaccurate reporting, and operational disruption as systems require remediation and data restoration from backups.
The CVSS 3.1 base score of 5.4 reflects a medium severity rating driven by the Local (AV:A) attack vector requirement but mitigated by the lack of authentication required for exploitation (PR:N). The vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N indicates that while availability is not directly impacted, both confidentiality and integrity are compromised at a low level. This scoring underscores the importance of network segmentation even within trusted environments. Attackers with physical or logical access to the server's subnet can exploit this flaw without needing social engineering or user interaction, making it a persistent threat for any organization lacking strict micro-segmentation policies around their ERP and financial applications.
To mitigate this vulnerability, organizations must implement robust network isolation strategies immediately. The most effective defense is placing Oracle Hyperion Calculation Manager in a dedicated VLAN that restricts access to only authorized management stations and application servers, effectively removing the Local attack vector for general users or compromised endpoints on broader corporate networks. Additionally, deploying Web Application Firewalls with rules specifically targeting unauthenticated requests to sensitive administrative endpoints can provide an additional layer of defense. It is imperative to apply all available security patches from Oracle as soon they are released for version 11.2.25.0.000 and subsequent updates. Regular vulnerability assessments should include testing for authentication bypasses on financial applications, ensuring that internal threats are detected before exploitation occurs. Monitoring logs for unusual access patterns or unauthorized data modifications can also aid in early detection of such exploits.