CVE-2026-83418 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. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Communications Cloud Native Core Security Edge Protection Proxy. While the vulnerability is in Oracle Communications Cloud Native Core Security Edge Protection Proxy, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Communications Cloud Native Core Security Edge Protection Proxy accessible data as well as unauthorized access to critical data or complete access to all Oracle Communications Cloud Native Core Security Edge Protection Proxy accessible data. CVSS 3.1 Base Score 8.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Security Edge Protection Proxy component of Oracle Communications Cloud Native Core, specifically affecting versions 26.1.200 and 25.2.201. This security flaw presents a significant risk to telecommunications infrastructure by allowing an attacker with low privileges and network access via HTTP to compromise the system. The nature of this vulnerability is characterized as difficult to exploit, which suggests that while it requires specific conditions or complex attack vectors to trigger successfully, its potential impact upon exploitation is severe. The presence of such a flaw in critical communication nodes underscores the importance of rigorous security controls within cloud-native core environments where data integrity and confidentiality are paramount for maintaining service reliability and user privacy.
From a technical perspective, the vulnerability enables unauthorized creation, deletion, or modification of access to critical data stored within the Security Edge Protection Proxy. This capability extends beyond simple information disclosure, as it directly impacts the integrity of the system by allowing attackers to alter essential configurations or data structures. Furthermore, successful exploitation grants complete access to all accessible data managed by the proxy, effectively breaking confidentiality controls. The ability to modify access permissions implies that an attacker could escalate privileges over time or create backdoors for persistent unauthorized entry, thereby transforming a single point of compromise into a broader systemic failure within the network architecture.
The operational impact of this vulnerability is substantial due to its potential scope change, meaning attacks against Oracle Communications Cloud Native Core Security Edge Protection Proxy can significantly impact additional products and services dependent on it. In telecommunications networks, the SEPP acts as a critical security gateway that protects signaling traffic between different network domains. Compromising this component could lead to widespread service disruption, interception of sensitive user communications, or manipulation of routing decisions affecting multiple downstream systems. The high confidentiality and integrity impacts reflected in the CVSS score indicate that organizations relying on these versions face severe risks regarding data privacy compliance and operational continuity if left unpatched.
The vulnerability is classified with a CVSS 3.1 Base Score of 8.2, indicating a High severity level. The vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N) reveals that while the attack requires high complexity and low privileges, it has no user interaction requirement and exhibits scope change behavior where impact extends beyond the vulnerable component. This scoring highlights the critical need for immediate remediation despite the exploitation difficulty, as automated tools or sophisticated threat actors may eventually develop reliable exploit chains to leverage this flaw at scale.
To mitigate these risks, organizations should prioritize applying the latest security patches provided by Oracle Communications immediately. In addition to patching, implementing strict network segmentation and firewall rules can limit HTTP access to only authorized management interfaces, reducing the attack surface available to low-privileged attackers. Monitoring for anomalous data modification patterns or unauthorized privilege escalation attempts within the SEPP logs is also recommended as a defensive measure. Aligning with industry standards such as CWE Category 200 (Information Exposure) and ATT&CK techniques related to Initial Access and Privilege Escalation can help in mapping this vulnerability to broader security frameworks for comprehensive risk management and compliance reporting.