CVE-2026-70790: Oracle Telecom Billing Auth Bypass Flaw

CVE-2026-70790 Overview

CVE-2026-70790 is a high-severity vulnerability in the Oracle Telecommunications Billing Integrator, a component of Oracle E-Business Suite. The flaw resides in the Internal Operations component and affects supported versions 12.2.3 through 12.2.15. An unauthenticated attacker with network access via HTTP can exploit the issue, though successful attacks require user interaction from a person other than the attacker. Because the vulnerability produces a scope change, exploitation can significantly impact additional products beyond the vulnerable component itself. Successful attacks enable unauthorized creation, deletion, or modification of critical data accessible to Oracle Telecommunications Billing Integrator.

Critical Impact
Attackers can compromise the integrity of Oracle Telecommunications Billing Integrator data and pivot to affect additional Oracle E-Business Suite products through scope change.

Affected Products

Oracle Telecommunications Billing Integrator 12.2.3
Oracle E-Business Suite versions 12.2.4 through 12.2.14
Oracle Telecommunications Billing Integrator 12.2.15

Discovery Timeline

2026-08-18 - CVE CVE-2026-70790 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70790

Vulnerability Analysis

The vulnerability affects the Internal Operations component of Oracle Telecommunications Billing Integrator. It is classified as an integrity-impact flaw that allows an unauthenticated remote attacker to modify, create, or delete critical data. The attack does not require privileges, but it does require a victim user to perform an action such as clicking a crafted link or loading attacker-influenced content. Because the vulnerability produces a scope change, the impact extends beyond the vulnerable component into other products in the Oracle E-Business Suite stack. Exploitation targets data integrity rather than confidentiality or availability, meaning affected records can be silently manipulated without triggering outages.

Root Cause

Oracle has not published detailed root-cause information for CVE-2026-70790. Based on the CVSS profile, the flaw resides in an HTTP-accessible interface within the Internal Operations component that fails to sufficiently validate or authorize requests arising from user interaction. See the Oracle Security Alert for authoritative technical detail.

Attack Vector

The attack vector is network-based over HTTP. An unauthenticated attacker crafts a malicious request or link and induces a user with access to the Oracle Telecommunications Billing Integrator environment to trigger it. Once triggered, the request abuses the Internal Operations component to modify data across a broader trust boundary. No verified proof-of-concept exploit is publicly available at time of publication.

No verified exploitation code is available for this vulnerability. Refer to the Oracle Security Alert for vendor-provided technical detail.

Detection Methods for CVE-2026-70790

Indicators of Compromise

Unexpected create, update, or delete operations on Oracle Telecommunications Billing Integrator tables originating from user sessions that recently followed inbound links from external sources.
HTTP requests to Internal Operations endpoints containing anomalous parameters or unusual referrer headers from untrusted domains.
Audit log entries showing data modifications that do not correspond to sanctioned business workflows.

Detection Strategies

Enable and centralize Oracle E-Business Suite audit logging for the Telecommunications Billing Integrator module and forward events to a SIEM for correlation.
Alert on HTTP requests to Internal Operations endpoints that lack expected session context or originate from anomalous referrers.
Correlate user click activity with subsequent privileged data changes to identify user-interaction-driven abuse.

Monitoring Recommendations

Monitor web server access logs for unusual POST volume against Telecommunications Billing Integrator paths.
Track database change events against critical billing tables and baseline expected activity patterns.
Review outbound email and collaboration channels for suspicious links targeting internal users with Oracle E-Business Suite access.

How to Mitigate CVE-2026-70790

Immediate Actions Required

Apply the patches referenced in the Oracle August 2026 Critical Security Patch Update advisory to all affected instances of Oracle Telecommunications Billing Integrator versions 12.2.3 through 12.2.15.
Restrict network exposure of Oracle E-Business Suite HTTP endpoints to trusted internal networks and VPN users only.
Brief users with access to the application on the risk of clicking untrusted links, since exploitation requires user interaction.

Patch Information

Oracle addressed this vulnerability in the August 2026 Critical Security Patch Update. Administrators should consult the Oracle Security Alert for the applicable patch identifiers and installation instructions.

Workarounds

Place the Oracle E-Business Suite web tier behind a web application firewall and block requests to Internal Operations endpoints from untrusted sources.
Enforce strict Referer and Origin header validation at the reverse proxy for state-changing HTTP methods.
Reduce the number of accounts with modification rights to billing data until patches are deployed.

bash

# Example WAF rule pattern to restrict Internal Operations endpoints
# to authenticated internal traffic only
location ~* /OA_HTML/.*InternalOperations.* {
    allow 10.0.0.0/8;
    deny all;
    proxy_set_header X-Forwarded-For $remote_addr;
}