CVE-2026-61286 Overview
CVE-2026-61286 is a high-severity vulnerability in the Oracle Enterprise Manager Base Platform, specifically within the Event Management component. Affected versions include 13.5 and 24.1. An unauthenticated attacker with network access via HTTP can exploit this flaw to compromise the platform. Successful exploitation permits unauthorized creation, deletion, or modification of critical data, read access to a subset of accessible data, and partial denial of service.
The vulnerability is tracked under CWE-284 (Improper Access Control) and requires no user interaction. Oracle disclosed the issue in the August 2026 Critical Patch Update.
Critical Impact
Remote unauthenticated attackers can modify or delete critical data across Oracle Enterprise Manager, undermining the integrity of the monitoring plane used to manage enterprise database and middleware estates.
Affected Products
- Oracle Enterprise Manager Base Platform 13.5
- Oracle Enterprise Manager Base Platform 24.1
- Event Management component of Oracle Enterprise Manager
Discovery Timeline
- 2026-08-18 - CVE-2026-61286 published to NVD
- 2026-08-20 - Last updated in NVD database
Technical Details for CVE-2026-61286
Vulnerability Analysis
The flaw resides in the Event Management component of Oracle Enterprise Manager Base Platform. This component processes monitoring events, alerts, and notifications generated by managed targets across the enterprise fleet. Improper access control in this component permits requests that should be gated behind authentication to reach sensitive functionality.
Attackers reach the vulnerable functionality over HTTP without credentials. The exploit path does not require user interaction, and attack complexity is low. Successful exploitation impacts integrity heavily, with additional partial confidentiality exposure and partial availability degradation.
Because Oracle Enterprise Manager centrally manages databases, middleware, and infrastructure, tampering with event records or event-related data can suppress alerts, disrupt monitoring workflows, and mask follow-on activity against managed targets.
Root Cause
The underlying weakness is Improper Access Control [CWE-284]. The Event Management component fails to enforce authentication or authorization checks on requests that write to or read from event-related resources. Oracle has not published implementation-level detail beyond the advisory.
Attack Vector
The attack vector is network-based HTTP traffic to an exposed Oracle Enterprise Manager Base Platform instance. No credentials, prior foothold, or victim interaction are required. See the Oracle Security Alert for the vendor's advisory and patch mapping.
Exploitation code is not publicly available at the time of publication, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS score is approximately 0.28%.
Detection Methods for CVE-2026-61286
Indicators of Compromise
- Unexpected creation, deletion, or modification of event records, notification rules, or incident objects within Oracle Enterprise Manager
- Anomalous HTTP requests to Enterprise Manager Event Management endpoints from unauthenticated or external sources
- Gaps or suppression in expected monitoring alerts from managed targets
Detection Strategies
- Review Oracle Enterprise Manager audit logs for event, incident, and notification changes that do not correlate to a known administrator session
- Correlate web server access logs with Enterprise Manager authentication logs to identify HTTP requests reaching Event Management endpoints without a valid session
- Compare current event rule and notification configurations against a known-good baseline
Monitoring Recommendations
- Forward Enterprise Manager access, audit, and application logs to a centralized analytics platform for retention and correlation
- Alert on administrative changes to event rules, metric thresholds, and notification methods outside change windows
- Monitor for external network access to Enterprise Manager management URLs, which should typically be restricted to internal operator networks
How to Mitigate CVE-2026-61286
Immediate Actions Required
- Apply the fixes from the Oracle August 2026 Critical Patch Update to all Oracle Enterprise Manager Base Platform 13.5 and 24.1 deployments
- Restrict network access to the Enterprise Manager console and OMS endpoints to trusted management networks only
- Audit Event Management configuration, notification rules, and recent event modifications for unauthorized changes
Patch Information
Oracle addressed CVE-2026-61286 in the August 2026 Critical Patch Update. Administrators should reference the Oracle Security Alert for exact patch identifiers, prerequisites, and post-installation validation steps for versions 13.5 and 24.1.
Workarounds
- Place Oracle Enterprise Manager behind a reverse proxy or web application firewall that enforces authentication and IP allow-listing on Event Management paths
- Segment the Enterprise Manager management network from general corporate and internet-facing networks
- Disable or restrict any unused Enterprise Manager HTTP endpoints until patches are deployed
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
