CVE-2026-91627 in Communications Billing and Revenue Management
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle Communications Billing and Revenue Management product of Oracle Communications (component: Platform). Supported versions that are affected are 15.0.0.0.0, 15.0.1.0.0, 15.1.0.0.0 and 15.2.0.0.0. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Communications Billing and Revenue Management executes to compromise Oracle Communications Billing and Revenue Management. Successful attacks of this vulnerability can result in takeover of Oracle Communications Billing and Revenue Management. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Oracle Communications Billing and Revenue Management platform, specifically affecting versions 15.0.0.0.0 through 15.2.0.0. This software suite is critical for telecommunications operators to manage customer accounts, billing processes, and revenue tracking. The flaw represents a significant security risk because it allows an attacker with low privileges on the underlying infrastructure where the application executes to compromise the entire system. Unlike vulnerabilities that require network exposure or user interaction, this issue leverages local access, meaning any entity that has gained even minimal foothold within the server environment can escalate their privileges and take full control of the billing platform.
From a technical perspective, the vulnerability enables an attacker with low-privileged logon credentials to execute actions that lead to complete system takeover. This typically implies a failure in privilege separation or access controls within the application logic or its integration with the operating system. The absence of proper validation for local operations allows malicious code or commands to bypass intended restrictions. Because the attack vector is local and requires no user interface interaction, it can be executed silently by an insider threat or an attacker who has already breached perimeter defenses through other means such as phishing or exploiting a less severe remote vulnerability on adjacent systems.
The operational impact of this vulnerability is severe, characterized by high impacts across confidentiality, integrity, and availability as reflected in the CVSS 3.1 base score of 7.8. A successful exploitation results in the attacker gaining administrative-level access to Oracle Communications Billing and Revenue Management. This compromise allows for unauthorized modification or deletion of critical billing data, manipulation of customer accounts, theft of sensitive financial information, and disruption of service delivery. For telecommunications providers, such integrity failures can lead to significant revenue loss, regulatory non-compliance due to mishandling of personal data, and reputational damage resulting from service outages caused by availability impacts.
In terms of industry standards classification, this vulnerability aligns with CWE-269 Improper Privilege Management or potentially CWE-78 OS Command Injection if the takeover involves executing system commands. The attack methodology corresponds to ATT&CK technique T1053 Scheduled Task/Job, specifically local execution variants like T1053.005 Cron, assuming the attacker utilizes scheduled tasks for persistence and privilege escalation. It also relates to T1078 Valid Accounts if the low-privileged access was obtained through credential theft or misconfiguration. The lateral movement potential is high as compromising this central billing system often provides a gateway to other connected financial and customer relationship management systems within the enterprise network.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Oracle should be consulted for available patches that address the specific privilege escalation flaw in the affected versions 15.0 through 15.2. Organizations running these versions are advised to apply security updates immediately upon availability. In addition to patching, strict adherence to least-privilege principles is essential. Administrative accounts used by the billing application should be isolated from general user infrastructure and protected with multi-factor authentication where possible. Network segmentation should ensure that systems hosting Oracle Communications Billing and Revenue Management are in a dedicated zone with restricted inbound and outbound traffic rules.
Furthermore, continuous monitoring of system logs for unusual local activity or privilege changes is recommended to detect potential exploitation attempts early. Security information and event management solutions should be configured to alert on any process execution by low-privileged users that interacts with core billing components. Regular audits of user permissions and service account configurations will help identify misconfigurations that could facilitate this type of attack. By combining timely patching with robust access controls and monitoring, organizations can significantly reduce the risk associated with this vulnerability in their telecommunications infrastructure.