CVE-2026-61262: Oracle Teleservice Auth Bypass Vulnerability

CVE-2026-61262 Overview

CVE-2026-61262 affects the Service Diagnostics Scripts component of Oracle Teleservice in Oracle E-Business Suite. An unauthenticated attacker with network access via HTTP can compromise the application without user interaction. Successful exploitation grants unauthorized update, insert, or delete access to a portion of Teleservice data, and unauthorized read access to a subset of Teleservice data.

The weakness is classified under [CWE-284] Improper Access Control. Oracle assigned a CVSS 3.1 Base Score of 6.5, with confidentiality and integrity impacts but no availability impact.

Critical Impact
Unauthenticated network attackers can modify and read a subset of Oracle Teleservice data over HTTP without user interaction.

Affected Products

Oracle E-Business Suite — Oracle Teleservice, versions 12.2.3 through 12.2.15
Component: Service Diagnostics Scripts

Discovery Timeline

2026-07-21 - CVE-2026-61262 published to NVD
2026-07-22 - Last updated in NVD database
July 2026 - Addressed in the Oracle Security Alert July 2026

Technical Details for CVE-2026-61262

Vulnerability Analysis

CVE-2026-61262 is an Improper Access Control flaw ([CWE-284]) in the Service Diagnostics Scripts component of Oracle Teleservice. The component fails to enforce authentication and authorization checks on HTTP-accessible endpoints that operate on Teleservice records.

Oracle Teleservice supports customer service and diagnostic workflows inside the E-Business Suite. When access controls on the diagnostics endpoints are missing or insufficient, remote users can invoke script functionality that reads and modifies backend data. The scope stays within the vulnerable component, and availability is not affected.

The vulnerability applies to Oracle E-Business Suite versions 12.2.3 through 12.2.15. Environments that expose the E-Business Suite HTTP tier to untrusted networks face the highest exposure. No public exploit code has been observed, and the CVE is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS probability is 0.255%.

Root Cause

The root cause is missing or insufficient access control enforcement on Service Diagnostics Scripts endpoints. The application processes HTTP requests without verifying that the caller is authenticated or authorized to invoke the diagnostic functions that read and modify Teleservice data.

Attack Vector

The attack vector is network-based over HTTP. An unauthenticated remote attacker sends crafted requests to the Oracle Teleservice diagnostics endpoints exposed by the E-Business Suite web tier. No credentials, privileges, or user interaction are required. Successful requests result in read, insert, update, or delete operations on a subset of Teleservice data.

No verified public proof-of-concept code is available for CVE-2026-61262. Refer to the Oracle Security Alert July 2026 for vendor-supplied technical guidance.

Detection Methods for CVE-2026-61262

Indicators of Compromise

Unauthenticated HTTP requests to Oracle Teleservice Service Diagnostics Scripts URLs from external or unexpected internal sources.
Unexpected INSERT, UPDATE, or DELETE operations against Teleservice tables outside of normal business workflows.
Access logs showing anonymous sessions invoking diagnostic script endpoints.

Detection Strategies

Review Oracle HTTP Server and Oracle E-Business Suite access logs for requests to Teleservice diagnostic paths that lack an authenticated session identifier.
Baseline normal Teleservice API usage patterns and alert on deviations in request volume, source IP diversity, or off-hours activity.
Enable database auditing on Teleservice schema objects to capture data modification events tied to diagnostic script execution.

Monitoring Recommendations

Forward E-Business Suite middle-tier and database audit logs to a centralized SIEM for correlation with network telemetry.
Monitor egress and ingress traffic to the E-Business Suite HTTP tier for anomalous source addresses and user agents.
Alert on privilege changes or bulk data operations against Teleservice objects immediately following diagnostics endpoint requests.

How to Mitigate CVE-2026-61262

Immediate Actions Required

Apply the July 2026 Oracle Critical Patch Update fixes for Oracle E-Business Suite Teleservice as documented in the Oracle Security Alert July 2026.
Restrict network access to the E-Business Suite HTTP tier so that only trusted networks or VPN users can reach Teleservice endpoints.
Audit Teleservice data for unexpected modifications during the exposure window.

Patch Information

Oracle addressed CVE-2026-61262 in the July 2026 Critical Patch Update. Administrators should follow the patch application steps in the Oracle Security Alert July 2026 for Oracle E-Business Suite versions 12.2.3 through 12.2.15.

Workarounds

Block external access to Service Diagnostics Scripts URLs at the reverse proxy or web application firewall until patches are applied.
Enforce authentication at the network layer for all Teleservice endpoints using an authenticating reverse proxy.
Disable unused diagnostic script functionality in Oracle Teleservice where operationally acceptable.

bash

# Example WAF rule concept: block unauthenticated access to Teleservice diagnostic paths
# Replace <teleservice-diagnostics-path> with the specific URL patterns used in your deployment
location ~* /<teleservice-diagnostics-path>/ {
    if ($http_cookie !~* "EBS_SESSION=") {
        return 403;
    }
}