CVE-2026-70780: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-70780 Overview

CVE-2026-70780 is a medium-severity vulnerability in the Server component of Oracle Hyperion Financial Reporting. The affected version is 11.2.25.0.000. An unauthenticated attacker with access to the physical communication segment attached to the hardware running Oracle Hyperion Financial Reporting can compromise the application. Successful exploitation results in unauthorized creation, deletion, or modification of critical data, and unauthorized read access to all data accessible by Oracle Hyperion Financial Reporting.

The vulnerability requires adjacent network access and has high attack complexity, limiting the practical exploitation surface. Oracle addressed the issue in the August 2026 Critical Security Update.

Critical Impact
An adjacent-network attacker without credentials can read, modify, or delete all data accessible to Oracle Hyperion Financial Reporting.

Affected Products

Oracle Hyperion Financial Reporting 11.2.25.0.000
Component: Server
Deployments exposing the Hyperion server to shared physical or Layer 2 network segments

Discovery Timeline

2026-08-18 - CVE-2026-70780 published to the National Vulnerability Database
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70780

Vulnerability Analysis

The flaw resides in the Server component of Oracle Hyperion Financial Reporting, a web-based reporting product within the Oracle Enterprise Performance Management (EPM) suite. Oracle's advisory classifies the issue as difficult to exploit and requires the attacker to be positioned on the same physical communication segment as the target host.

Exploitation does not require authentication or user interaction. A successful attack compromises confidentiality and integrity of all data accessible to the Hyperion server, including financial reports, definitions, and stored metadata. Availability is not affected.

Because the attack vector is adjacent network (AV:A), exposure is largely limited to internal LANs, virtualization hosts sharing broadcast domains, or cloud subnets where the Hyperion server resides. Environments that expose Hyperion services beyond a hardened management segment increase the practical risk.

Root Cause

Oracle has not disclosed the specific weakness class. The impact profile — unauthenticated adjacent-network access producing full read and write compromise of application data — is consistent with a flaw in a network-facing service protocol handler or authentication layer used by the Hyperion server. Refer to the Oracle Security Alert CSPUAUG2026 for the vendor description.

Attack Vector

The attacker must reach the Hyperion server over the local physical or logical network segment. From that position the attacker interacts with an exposed server service to read or modify data without providing credentials. No user interaction is required, and scope is unchanged, meaning impact is contained to the Hyperion Financial Reporting security authority.

No public proof-of-concept exploit is available. The Exploit Prediction Scoring System (EPSS) probability is 0.192%, placing this CVE in the 9.256 percentile of likely-exploited vulnerabilities. No verified exploitation code is available; the vulnerability is described in prose per Oracle's advisory.

Detection Methods for CVE-2026-70780

Indicators of Compromise

Unexpected creation, modification, or deletion of Hyperion Financial Reporting report definitions, folders, or artifact metadata by non-interactive sessions.
Anomalous connections to Hyperion server ports originating from hosts on the same VLAN or subnet that do not normally communicate with the reporting server.
Bulk read operations against report repositories outside of business hours or scheduled batch windows.

Detection Strategies

Enable Oracle Hyperion audit logging for repository read and write events and forward logs to a centralized SIEM for correlation.
Baseline expected client IP ranges for the Hyperion server and alert on connections from unexpected adjacent hosts.
Monitor Windows or Linux host telemetry on the Hyperion server for unusual child processes spawned by the Hyperion service account.

Monitoring Recommendations

Instrument network flow collection on the VLAN hosting the Hyperion server to detect lateral scanning and unauthorized adjacent connections.
Alert on modifications to sensitive financial report definitions performed outside of change-management windows.
Track authentication and session anomalies against Hyperion Shared Services, including sessions that bypass expected authentication flows.

How to Mitigate CVE-2026-70780

Immediate Actions Required

Apply the Oracle Critical Security Update referenced in the Oracle Security Alert CSPUAUG2026 to affected 11.2.25.0.000 deployments.
Restrict network reachability of the Hyperion Financial Reporting server to an isolated management VLAN with strict access-control lists.
Inventory all Oracle Hyperion Financial Reporting instances and verify version and patch status.

Patch Information

Oracle released a fix for CVE-2026-70780 in the August 2026 Critical Security Update. Administrators should download and apply the patch identified in the Oracle Security Alert CSPUAUG2026 advisory. Test the update in a staging environment before promoting to production, and validate report execution, security-role bindings, and Shared Services integration after patching.

Workarounds

Segment the Hyperion server onto a dedicated VLAN with firewall enforcement to reduce the adjacent-network exposure required for exploitation.
Enforce 802.1X or MAC-based access control on switches serving the Hyperion server segment to limit which hosts can reach the physical communication segment.
Disable or block network access to non-essential Hyperion server services until the patch is applied.

bash

# Example: restrict inbound access to the Hyperion server segment using iptables
# Replace 10.10.20.0/24 with the trusted management subnet
# Replace 10.10.50.10 with the Hyperion server address
iptables -A INPUT -s 10.10.20.0/24 -d 10.10.50.10 -p tcp -m multiport --dports 8200,8205,19000 -j ACCEPT
iptables -A INPUT -d 10.10.50.10 -p tcp -m multiport --dports 8200,8205,19000 -j DROP