CVE-2026-83419 in Communications Cloud Native Core Security Edge Protection Proxy
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Communications Cloud Native Core Security Edge Protection Proxy product of Oracle Communications (component: SEPP). Supported versions that are affected are 26.1.200 and 25.2.201. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Communications Cloud Native Core Security Edge Protection Proxy. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Communications Cloud Native Core Security Edge Protection Proxy accessible data as well as unauthorized read access to a subset of Oracle Communications Cloud Native Core Security Edge Protection Proxy accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The Oracle Communications Cloud Native Core Security Edge Protection Proxy, specifically within versions 26.1.200 and 25.2.201, contains a critical security flaw that compromises the integrity and confidentiality of sensitive network data. This vulnerability resides in the SEPP component, which serves as a crucial gateway for securing signaling traffic between different mobile networks using protocols such as HTTP-based interfaces. The presence of this weakness indicates a failure in proper access control mechanisms or input validation processes within the application layer, allowing unauthorized entities to interact with internal systems that should be restricted to authenticated and authorized users only.
An attacker possessing low-level privileges but having network connectivity via HTTP can exploit this flaw without requiring user interaction. This characteristic classifies the vulnerability as an easily exploitable remote attack vector. The lack of a requirement for user interface involvement means that automated tools or scripts can leverage this weakness to execute malicious actions against the SEPP infrastructure. The attacker does not need elevated system rights, which significantly lowers the barrier to entry and increases the likelihood of exploitation by opportunistic threat actors scanning for vulnerable services on open ports.
The operational impact of a successful exploit is twofold, affecting both data confidentiality and integrity as reflected in the CVSS 3.1 base score of 5.4. On one hand, an attacker can gain unauthorized read access to a subset of accessible data within the SEPP environment. This could involve sensitive subscriber information, network topology details, or signaling messages that are critical for mobile communication operations. The exposure of such data violates privacy regulations and provides adversaries with intelligence useful for further attacks against the telecommunications infrastructure. On the other hand, the vulnerability permits unauthorized updates, inserts, or deletes to accessible data. This integrity violation allows an attacker to modify configuration settings, alter routing rules, or corrupt database records, potentially leading service disruptions or misdirection of traffic.
From a classification perspective, this vulnerability aligns with CWE-269 Improper Privilege Management and CWE-862 Missing Authorization. The ability for low-privileged users to perform administrative-like actions such as data modification suggests that the application fails to enforce strict role-based access controls on its HTTP endpoints. In terms of offensive security frameworks, this behavior is consistent with ATT&CK technique T1078 Valid Accounts, where attackers use legitimate credentials or lower-level permissions to gain unauthorized access and manipulate system resources. The network-accessible nature via HTTP also relates to exposure of sensitive information through web services that lack proper authentication checks on specific API endpoints.
Mitigation strategies must focus immediately on restricting access to the affected SEPP components. Organizations should ensure that only authorized management networks can reach these interfaces, utilizing firewalls and network segmentation to block external or untrusted HTTP traffic. If possible, upgrading to a patched version of Oracle Communications Cloud Native Core is the primary remediation step. In cases where patching is not immediately feasible, implementing strict access control lists on the firewall level to limit source IP addresses that can communicate with the SEPP over HTTP is essential. Additionally, enabling comprehensive logging and monitoring for anomalous data modification or read activities can help in detecting exploitation attempts early. Regular security audits of API endpoints should be conducted to ensure that privilege escalation paths are closed and that all sensitive operations require appropriate authentication levels beyond low-privileged user status.