CVE-2026-46935: Oracle Complex Maintenance, Repair and Overhaul Vulnerability (CVSS 7.5)

Technical summary

CVE-2026-46935 is a network-accessible vulnerability in the Internal Operations module of Oracle Complex Maintenance, Repair and Overhaul. It requires a low-privilege authenticated user and HTTP access to exploit. The underlying issue relates to improper access controls and privilege verification (CWE-269, CWE-284, CWE-306), allowing an attacker to bypass security checks and gain unauthorized control over the component. The attack has no user interaction requirement, making it deterministic once the preconditions are met. CVSS 3.1 base score of 7.5 reflects high confidentiality, integrity, and availability impact despite difficult exploitation conditions.

Business impact

Compromise of maintenance and repair operations can halt service delivery, disrupt supply chain visibility, and prevent timely asset servicing. For organizations dependent on Oracle E-Business Suite for field operations, this vulnerability poses operational continuity risk. Attackers gaining control could forge work orders, hide maintenance history, or disable critical asset tracking—creating compliance gaps and safety concerns in regulated industries. The requirement for low-privilege access means insider threats or compromised contractor accounts become effective attack vectors.

Affected systems

Oracle Complex Maintenance, Repair and Overhaul versions 12.2.3 through 12.2.15 are affected. This component is typically deployed as part of larger Oracle E-Business Suite installations supporting manufacturing, field service, and asset-intensive operations. Organizations should inventory instances of this module across development, test, and production environments, paying particular attention to systems exposed to corporate networks or integrations with partner systems.

Exploitability

While the CVSS vector indicates difficult exploitation (AC:H), the requirement for only low-privilege authentication and network access means the threat is substantial within typical enterprise environments. Exploitation does not require social engineering or user interaction. The barrier is primarily technical complexity in crafting the attack, not access barriers. Once an attacker obtains low-privilege credentials—through phishing, credential reuse, or insider access—exploitation becomes feasible. The vulnerability is not currently listed in CISA's Known Exploited Vulnerabilities catalog, but organizations should assume adversaries are developing proof-of-concept code.

Remediation

Oracle has issued security updates for affected versions. Organizations must apply patches to all instances of versions 12.2.3–12.2.15. Verify patch applicability in the Oracle security advisory and test in non-production environments before rolling out to production. As an interim control, restrict HTTP access to the Complex Maintenance, Repair and Overhaul component to authorized users and networks, and monitor for unusual activity from low-privilege accounts.

Patch guidance

Consult Oracle's official security advisory for CVE-2026-46935 to identify the specific patch version applicable to your release level within the 12.2.3–12.2.15 range. Apply patches in a staged approach: first to development, then test environments, and finally production systems during maintenance windows. Verify successful patching by reviewing the installed patch identifier in your Oracle environment. If you are on a version prior to 12.2.3 or have already upgraded beyond 12.2.15, confirm your configuration is not affected by cross-checking the component version against the advisory.

Detection guidance

Monitor for failed and successful authentication attempts to the Complex Maintenance, Repair and Overhaul module, particularly from low-privilege accounts accessing sensitive operations. Log and alert on unusual HTTP requests to the Internal Operations component endpoints. Correlate user privilege escalation events with network access patterns. Review Oracle audit logs for unauthorized modifications to maintenance records or work orders. Implement network segmentation to restrict access to the component and maintain detailed access controls.

Why prioritize this

HIGH priority. Although exploitation is marked as difficult, the impact is complete system compromise with no external safeguards, the affected user base (low-privilege accounts) is broad, and network accessibility removes physical barriers. Organizations with exposed or internet-facing E-Business Suite instances should prioritize this immediately. Even internally-deployed systems warrant urgent assessment given the credential-based attack surface and the criticality of maintenance operations in production environments.

Risk score, explained

The CVSS 3.1 score of 7.5 (HIGH) reflects the combination of network accessibility, high impact across confidentiality, integrity, and availability, and the low-privilege requirement. The 'difficult exploitation' modifier prevents a critical rating, but the attack vector and consequence severity justify high-priority treatment. In enterprise contexts where multiple users hold low-privilege credentials and internal threat models include insider or supply-chain compromise scenarios, the effective exploitability risk exceeds the base score's conservative framing.

Frequently asked questions