CVE-2026-62580: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-62580 Overview

CVE-2026-62580 affects the Oracle Hyperion Calculation Manager product within the Oracle Hyperion suite. The flaw resides in the Security component of version 11.2.25.0.000. A low-privileged attacker with access to the adjacent physical communication segment can compromise the application under difficult exploitation conditions. Successful exploitation permits unauthorized update, insert, or delete operations against a subset of accessible data. Confidentiality and availability are not affected, and no authentication bypass or code execution vector is described in the Oracle advisory.

Critical Impact
Successful exploitation allows unauthorized modification of a subset of Oracle Hyperion Calculation Manager data. Confidentiality and availability remain intact, and no public exploit or in-the-wild activity has been reported.

Affected Products

Oracle Hyperion Calculation Manager 11.2.25.0.000
Component: Security
Deployments exposing the Calculation Manager to adjacent network segments

Discovery Timeline

2026-08-18 - CVE-2026-62580 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-62580

Vulnerability Analysis

The vulnerability affects the Security component of Oracle Hyperion Calculation Manager. Oracle classifies exploitation as difficult and requires that the attacker already hold low-level privileges within the environment. The attacker must also reside on the same physical communication segment as the host running Calculation Manager. Once these preconditions are met, the attacker can perform unauthorized write operations against a limited scope of application-accessible data. The advisory does not describe confidentiality loss, service disruption, or lateral pivot capabilities. Exploitability is bounded by the adjacent-network requirement and the low integrity impact, which explains the modest base score assigned by Oracle.

Root Cause

Oracle's advisory attributes the issue to the Security component of Calculation Manager without disclosing a specific weakness class or [CWE] mapping. The lack of published technical details, combined with the adjacent-network attack vector, is consistent with an authorization or input-handling deficiency reachable only from the local broadcast domain.

Attack Vector

Exploitation requires network adjacency to the Calculation Manager host. The attacker must authenticate with low privileges before invoking the vulnerable code path. Given the absence of a public proof of concept, no exploit chain has been documented. See the Oracle Security Alert for vendor-provided details.

No verified proof-of-concept code is available. Refer to the Oracle advisory for authoritative remediation guidance.

Detection Methods for CVE-2026-62580

Indicators of Compromise

Unexpected modifications, insertions, or deletions inside Hyperion Calculation Manager objects such as rules, formulas, or allocation logic.
Authenticated sessions originating from hosts on the same physical segment as the Calculation Manager server that perform write operations outside change-management windows.
Low-privileged Hyperion accounts issuing write requests that fall outside their documented role scope.

Detection Strategies

Correlate Hyperion audit logs with authentication events to identify write actions performed by low-privileged accounts.
Baseline normal Calculation Manager write patterns and alert on deviations, particularly those originating from adjacent subnets.
Enable Oracle Hyperion detailed auditing for the Security component to capture object-level change events.

Monitoring Recommendations

Forward Hyperion application logs and operating system logs to a centralized analytics platform for correlation.
Monitor network flows on the segment hosting Calculation Manager for unusual peer-to-peer traffic from workstations to the application host.
Track privileged and low-privileged account activity for anomalous write behavior over rolling windows.

How to Mitigate CVE-2026-62580

Immediate Actions Required

Apply the fix delivered in the Oracle Critical Patch Update referenced in the Oracle Security Alert.
Inventory Hyperion Calculation Manager deployments and confirm whether version 11.2.25.0.000 is present.
Restrict access to the physical or logical segment hosting Calculation Manager to administrative hosts only.

Patch Information

Oracle addresses CVE-2026-62580 in the August 2026 Critical Patch Update. Administrators should follow the Oracle Security Alert for the appropriate patch bundle and installation procedure for Hyperion Calculation Manager 11.2.25.0.000.

Workarounds

Segment the Calculation Manager host onto a dedicated VLAN with strict access control lists limiting adjacent hosts.
Enforce least privilege on Hyperion accounts and remove unused low-privileged accounts that could serve as an attacker foothold.
Increase logging verbosity for the Security component until the vendor patch is applied.

bash

# Configuration example
# Verify installed Hyperion Calculation Manager version before patching
cat $EPM_ORACLE_INSTANCE/CalcMgr/version.txt