CVE-2026-70871: Oracle Hyperion DRM Auth Bypass Vulnerability

CVE-2026-70871 Overview

CVE-2026-70871 is a critical vulnerability in the Oracle Hyperion Data Relationship Management product, within the Access and security component. The affected supported version is 11.2.25.0.000. An unauthenticated attacker with network access via TCP can exploit the flaw to compromise the product. Successful exploitation results in complete takeover of Oracle Hyperion Data Relationship Management, impacting confidentiality, integrity, and availability.

Oracle disclosed the issue in the Oracle Security Alert August 2026. No public proof-of-concept has been observed, and the flaw is not listed in CISA KEV at this time.

Critical Impact
Remote, unauthenticated attackers can fully take over Oracle Hyperion Data Relationship Management instances reachable over the network.

Affected Products

Oracle Hyperion Data Relationship Management 11.2.25.0.000
Component: Access and security
Deployments exposing Hyperion DRM services over TCP

Discovery Timeline

2026-08-18 - CVE-2026-70871 published to NVD
2026-08-18 - Oracle Security Alert August 2026 released
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70871

Vulnerability Analysis

The vulnerability resides in the Access and security component of Oracle Hyperion Data Relationship Management. Oracle classifies the issue as easily exploitable and reachable over TCP without authentication or user interaction. A successful attack compromises the entire application, exposing master data, hierarchy definitions, and administrative functions.

Because Hyperion DRM manages enterprise master data across financial and operational systems, a compromise can pivot into downstream reporting, consolidation, and planning platforms. Attackers who take over DRM can alter hierarchies, exfiltrate sensitive dimensional data, and disrupt financial close processes.

Oracle has not publicly disclosed the underlying weakness class. Based on the CVSS profile and the affected component, the flaw likely stems from an authentication or authorization defect in a network-exposed service. See the Oracle Security Alert August 2026 for authoritative details.

Root Cause

The defect exists in the Access and security component that gates network access to Hyperion DRM. Oracle's advisory indicates the scope is unchanged, meaning the attacker operates within the vulnerable component's security authority to achieve full compromise. No CWE identifier has been published.

Attack Vector

Exploitation requires only network reachability to a vulnerable Hyperion DRM instance over TCP. The attacker does not need credentials, prior access, or user interaction. The EPSS score is 0.358% (29th percentile) as of 2026-08-23, indicating low observed exploitation activity to date. That estimate can change quickly once technical details or tooling become public.

No verified exploit code or proof-of-concept is currently available. Describing exploitation in prose only is appropriate until Oracle or third parties publish additional technical detail.

Detection Methods for CVE-2026-70871

Indicators of Compromise

Unexpected administrative logins or new privileged accounts in Hyperion DRM audit logs
Anomalous hierarchy, node, or property modifications outside change windows
Outbound connections from the DRM application server to unknown external hosts
New processes or scheduled tasks spawned by the DRM service account

Detection Strategies

Compare running Hyperion DRM build against 11.2.25.0.000 and validate patch state from the August 2026 Oracle alert
Alert on TCP connections to DRM service ports from unexpected network segments or external ranges
Baseline DRM API and web endpoint traffic, then flag deviations in volume, verbs, or user-agents
Correlate DRM audit events with endpoint telemetry from the underlying Windows or application server

Monitoring Recommendations

Forward Hyperion DRM audit logs, IIS or web tier logs, and host telemetry to a centralized SIEM
Monitor the DRM service account for interactive logons, credential dumping, or lateral movement
Track configuration and export activity that could indicate mass data exfiltration
Review firewall and network flow records for TCP sessions to DRM from non-approved subnets

How to Mitigate CVE-2026-70871

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert August 2026 to all Hyperion DRM 11.2.25.0.000 instances
Inventory every Hyperion DRM deployment, including non-production and disaster recovery systems
Restrict network access to DRM TCP services so only approved application and administrative hosts can connect
Rotate service account credentials, API keys, and shared secrets used by Hyperion DRM

Patch Information

Oracle addressed CVE-2026-70871 in the Oracle Security Alert Advisory published on 2026-08-18. Administrators should review the Oracle Security Alert August 2026 for the specific patch bundle applicable to Hyperion Data Relationship Management 11.2.25.0.000. Apply the update in a test environment before rolling to production, and verify version metadata after installation.

Workarounds

Place Hyperion DRM behind a VPN or zero-trust network segment until patches are deployed
Enforce strict firewall allow-lists on all DRM listening ports
Disable or block any DRM network interfaces that are not required for business operations
Increase logging verbosity and retention on DRM and its supporting web tier during the remediation window

bash

# Example: restrict inbound TCP to Hyperion DRM to approved subnets only (Windows firewall)
New-NetFirewallRule -DisplayName "Restrict Hyperion DRM TCP" `
  -Direction Inbound `
  -Protocol TCP `
  -LocalPort 5240,5250 `
  -RemoteAddress 10.10.20.0/24,10.10.30.0/24 `
  -Action Allow

New-NetFirewallRule -DisplayName "Block Hyperion DRM TCP Default" `
  -Direction Inbound `
  -Protocol TCP `
  -LocalPort 5240,5250 `
  -Action Block