CVE-2026-71105 Overview
CVE-2026-71105 affects Oracle Hyperion Financial Management version 11.2.25.0.000 in the Security component. The flaw allows a low-privileged attacker with local logon access to the infrastructure running Oracle Hyperion Financial Management to trigger a hang or repeatable crash. Successful exploitation results in a complete denial of service of the affected instance. The vulnerability is classified under CWE-284 (Improper Access Control) and requires high attack complexity.
Critical Impact
A local, authenticated attacker can cause complete denial of service against Oracle Hyperion Financial Management, disrupting enterprise financial consolidation and reporting workflows.
Affected Products
- Oracle Hyperion Financial Management 11.2.25.0.000
- Oracle Hyperion (Security component)
- Deployments running the affected on-premises version
Discovery Timeline
- 2026-08-18 - CVE-2026-71105 published to NVD
- 2026-08-18 - Oracle publishes Oracle Security Alert - August 2026
- 2026-08-20 - Last updated in NVD database
Technical Details for CVE-2026-71105
Vulnerability Analysis
The vulnerability resides in the Security component of Oracle Hyperion Financial Management. An authenticated user with low privileges on the host running the product can exploit the flaw to cause the service to hang or crash. The issue impacts availability only. Confidentiality and integrity are not affected. Exploitation requires local access to the infrastructure where Hyperion Financial Management executes, and the attack complexity is high, meaning the attacker must satisfy conditions outside their direct control.
The root weakness maps to CWE-284, Improper Access Control. Insufficient enforcement in the Security component allows low-privileged users to reach code paths that destabilize the application process. The EPSS probability at publication is 0.084%, indicating no observed exploitation activity in the wild.
Root Cause
Oracle has not released a public technical breakdown of the underlying defect. The advisory attributes the issue to the Security subsystem and characterizes it as an access control weakness that enables local users to induce a repeatable crash of the Hyperion Financial Management service.
Attack Vector
Exploitation requires the attacker to already possess valid credentials and interactive or local logon rights to the infrastructure running Hyperion Financial Management. The attacker does not need user interaction. Once conditions permit, the attacker triggers the vulnerable code path in the Security component, producing a hang or crash that constitutes a complete denial of service for the application. No verified public proof-of-concept is available. See the Oracle Security Alert - August 2026 for vendor guidance.
Detection Methods for CVE-2026-71105
Indicators of Compromise
- Unexpected termination or unresponsiveness of the Hyperion Financial Management service process
- Repeated application crashes correlated with authenticated local sessions
- Anomalous logon events on Hyperion infrastructure from low-privileged accounts preceding service failure
Detection Strategies
- Correlate Windows event logs and Hyperion application logs to identify crashes tied to specific user sessions
- Alert on repeated service restarts of Hyperion Financial Management within short time windows
- Monitor for low-privileged accounts performing atypical operations against the Security component
Monitoring Recommendations
- Ingest Hyperion application, Windows Security, and Windows System logs into a centralized SIEM for correlation
- Baseline normal Hyperion service uptime and alert on deviations
- Track authentication and logon activity on hosts running Hyperion Financial Management, focusing on non-administrative accounts
How to Mitigate CVE-2026-71105
Immediate Actions Required
- Apply the fix documented in the Oracle Security Alert - August 2026 as soon as change windows permit
- Restrict interactive and local logon rights on Hyperion Financial Management hosts to a minimal set of administrative users
- Audit existing accounts with logon access to identify unnecessary or dormant privileges
Patch Information
Oracle addressed CVE-2026-71105 in the August 2026 Critical Patch Update cycle. Administrators running Oracle Hyperion Financial Management 11.2.25.0.000 should review the Oracle Security Alert - August 2026 and apply the corresponding patches for the Security component.
Workarounds
- Limit local and remote logon access to the Hyperion infrastructure to trusted administrators until patches are deployed
- Enforce least privilege on all accounts interacting with Hyperion Financial Management
- Increase monitoring of service health and prepare automated restart procedures to reduce downtime during any exploitation attempt
# Configuration example: restrict interactive logon on Windows hosts running Hyperion
# Use Group Policy: Computer Configuration > Windows Settings > Security Settings
# > Local Policies > User Rights Assignment
# Adjust the following policies to an approved administrator group only:
# - Allow log on locally
# - Allow log on through Remote Desktop Services
# Then force policy refresh:
gpupdate /force
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
