CVE-2026-46981: Oracle Utilities Auth Bypass Vulnerability

CVE-2026-46981 Overview

CVE-2026-46981 is a high-severity access control vulnerability [CWE-284] in the Mobile component of Oracle Utilities Network Management System (NMS). The flaw affects Oracle Utilities Applications versions 2.5.0.1.0-2.5.0.1.17, 2.5.0.2.0-2.5.0.2.11, 2.6.0.1.0-2.6.0.1.12, 2.6.0.2.0-2.6.0.2.8, and 25.12.0.0.0-25.12.0.0.2. An unauthenticated attacker with network access via HTTP can compromise the system without user interaction. The vulnerability carries a scope change, meaning successful exploitation can affect additional products beyond NMS itself.

Critical Impact
Remote unauthenticated attackers can gain unauthorized read, insert, update, and delete access to Oracle Utilities NMS data with a scope change impacting adjacent products.

Affected Products

Oracle Utilities Network Management System 2.5.0.1.0 through 2.5.0.1.17
Oracle Utilities Network Management System 2.5.0.2.0 through 2.5.0.2.11, 2.6.0.1.0 through 2.6.0.1.12, and 2.6.0.2.0 through 2.6.0.2.8
Oracle Utilities Network Management System 25.12.0.0.0 through 25.12.0.0.2

Discovery Timeline

2026-07-21 - CVE-2026-46981 published to NVD as part of the Oracle Critical Patch Update advisory cycle
2026-07-23 - Last updated in NVD database

Technical Details for CVE-2026-46981

Vulnerability Analysis

The vulnerability resides in the Mobile component of Oracle Utilities Network Management System. Oracle classifies the flaw as easily exploitable, requiring no authentication, no privileges, and no user interaction. An attacker reaches the vulnerable code path over HTTP, making internet-facing or intranet-exposed NMS deployments the primary risk surface.

Successful exploitation yields partial confidentiality and integrity impact. Attackers can read a subset of NMS-accessible data and can insert, update, or delete some data records. Availability is not affected. The scope change designation indicates that exploitation can propagate impact to security domains beyond the vulnerable NMS component, potentially affecting integrated Oracle Utilities Applications.

Root Cause

The issue maps to CWE-284 (Improper Access Control). The Mobile component fails to enforce authorization checks on requests that modify or read NMS data. This allows anonymous HTTP callers to reach functionality that should require authenticated, privileged access. Oracle has not published low-level technical detail beyond the Oracle Security Alert July 2026.

Attack Vector

The attack vector is network-based over HTTP. An attacker crafts HTTP requests to the NMS Mobile endpoint and invokes data operations without providing credentials. Because attack complexity is low and no user interaction is required, exploitation can be automated and scaled against exposed instances. The scope change means data or operations belonging to downstream Oracle Utilities components may also be reached through the initial compromise.

See the Oracle Security Alert July 2026 for vendor-authoritative technical detail.

Detection Methods for CVE-2026-46981

Indicators of Compromise

Unauthenticated HTTP requests to Oracle Utilities NMS Mobile component endpoints, particularly requests that succeed without a session token or authorization header.
Unexpected INSERT, UPDATE, or DELETE operations against NMS database tables originating from the Mobile service account.
Anomalous outbound data reads from NMS to unrecognized client IP addresses over HTTP or HTTPS.

Detection Strategies

Inspect NMS Mobile access logs for HTTP requests that return 2xx responses without a preceding authentication event.
Correlate application-layer logs with database audit trails to identify write operations that lack an authenticated user context.
Deploy web application firewall rules to flag anomalous request patterns targeting Mobile component URIs.

Monitoring Recommendations

Forward NMS application, web server, and database audit logs to a centralized SIEM for cross-source correlation.
Baseline normal Mobile component traffic volumes and alert on statistical deviations in request rate or method mix.
Monitor for scope-change indicators such as lateral HTTP calls from NMS hosts to adjacent Oracle Utilities services.

How to Mitigate CVE-2026-46981

Immediate Actions Required

Apply the July 2026 Oracle Critical Patch Update fixes for Oracle Utilities Network Management System to all affected versions.
Inventory NMS deployments and confirm patch level against the version ranges listed in the Oracle advisory.
Restrict network exposure of the NMS Mobile component to trusted networks and VPN-terminated clients only.
Audit NMS data for unauthorized changes covering the period from initial exposure to patch application.

Patch Information

Oracle addressed CVE-2026-46981 in the July 2026 Critical Patch Update. Administrators should consult the Oracle Security Alert July 2026 for the specific patch bundles corresponding to each affected version branch. No supported version outside the listed ranges is confirmed unaffected without applying the CPU.

Workarounds

Place the NMS Mobile component behind a reverse proxy that enforces authentication before requests reach the application.
Apply network segmentation and firewall rules to block untrusted sources from reaching Mobile component ports.
Enable enhanced database auditing on NMS schemas to capture write operations pending patch deployment.

bash

# Example: restrict access to the NMS Mobile component using iptables
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP