CVE-2026-70674 Overview
CVE-2026-70674 is a high-severity vulnerability in the Oracle Reports Developer product of Oracle Fusion Middleware. The affected component is Security and Authentication, and the supported version confirmed as affected is 14.1.2.0.0. An unauthenticated attacker with access to the physical communication segment attached to the hardware running Oracle Reports Developer can compromise the product. Successful exploitation results in full takeover of Oracle Reports Developer, with impacts to confidentiality, integrity, and availability. Oracle addressed the issue in its August 2026 Critical Patch Update security alert.
Critical Impact
Successful exploitation allows an unauthenticated adjacent-network attacker to take over Oracle Reports Developer, compromising confidentiality, integrity, and availability.
Affected Products
- Oracle Fusion Middleware
- Oracle Reports Developer
- Oracle Reports Developer version 14.1.2.0.0
Discovery Timeline
- 2026-08-18 - CVE-2026-70674 published to NVD
- 2026-08-20 - Last updated in NVD database
Technical Details for CVE-2026-70674
Vulnerability Analysis
The vulnerability resides in the Security and Authentication component of Oracle Reports Developer within Oracle Fusion Middleware. Oracle classifies the issue as easily exploitable and reachable without authentication. An attacker must have access to the same physical communication segment as the target host, which limits exploitation to adjacent-network positions such as the local LAN or broadcast domain. Once positioned, an attacker can send crafted traffic to the vulnerable service and gain full control of the Oracle Reports Developer instance. Oracle's advisory does not disclose the underlying weakness class, and no CWE identifier has been assigned.
Root Cause
Oracle has not published detailed root-cause information for CVE-2026-70674. The advisory attributes the flaw to the Security and Authentication component, indicating a weakness in how Oracle Reports Developer validates or enforces authentication for requests originating on the local network segment. Refer to the Oracle Security Alert for vendor-supplied details.
Attack Vector
The attack vector is Adjacent Network. The attacker does not require credentials, user interaction, or elevated privileges. Exploitation requires network access to the same physical or logical segment as the vulnerable server, such as an attached VLAN or broadcast domain. Because the impact covers confidentiality, integrity, and availability, a successful attacker can read data processed by Reports Developer, modify report definitions or output, and disrupt reporting services. See the Oracle Security Alert for exploitation prerequisites documented by the vendor.
Detection Methods for CVE-2026-70674
Indicators of Compromise
- Unexpected authentication events or new administrative sessions on Oracle Reports Developer 14.1.2.0.0 hosts originating from local network peers.
- Modification of report definitions, configuration files, or output directories without a corresponding change ticket.
- New or unusual outbound connections initiated by Oracle Reports Developer processes following inbound adjacent-network traffic.
Detection Strategies
- Baseline expected client subnets for Oracle Reports Developer and alert on connections from unexpected hosts on the same segment.
- Enable and centralize Oracle Fusion Middleware audit logs, focusing on the Security and Authentication component for anomalous events.
- Correlate host process activity on Reports Developer servers with inbound network sessions to identify post-exploitation behavior.
Monitoring Recommendations
- Forward Oracle Fusion Middleware and host operating system logs to a centralized SIEM for retention and correlation.
- Monitor for privilege changes, service restarts, and configuration file writes on servers hosting Oracle Reports Developer 14.1.2.0.0.
- Track east-west traffic to Reports Developer listening ports and alert on scanning or protocol anomalies from adjacent hosts.
How to Mitigate CVE-2026-70674
Immediate Actions Required
- Apply the Oracle August 2026 Critical Patch Update for Oracle Fusion Middleware to all Oracle Reports Developer 14.1.2.0.0 instances.
- Inventory all Oracle Reports Developer deployments and confirm patch status against the vendor advisory.
- Restrict network access to Reports Developer hosts to a minimal set of trusted management and application subnets.
Patch Information
Oracle released fixes for CVE-2026-70674 as part of its August 2026 security alert cycle. Administrators should consult the Oracle Security Alert for the specific patch bundles, prerequisites, and installation instructions applicable to Oracle Fusion Middleware 14.1.2.0.0.
Workarounds
- Segment Oracle Reports Developer servers onto dedicated management VLANs and enforce Layer 2 isolation from general user networks.
- Apply host-based firewall rules that restrict inbound connections to Reports Developer services to known administrative sources.
- Disable or shut down Oracle Reports Developer instances that are not required for business operations until patches are applied.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
