Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessObtain high-privilege TLS access to OCCAS 8.3
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DeliveryReach Security component over network
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ExploitExploit flawed security logic (AC:H)
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ExecutionEscalate to full server takeover
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ImpactCross scope boundary to affected downstream products
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires the attacker to already possess high privileges (PR:H) on Oracle Communications Converged Application Server 8.3 and network access specifically via TLS (AV:N against the TLS-facing Security component); no user interaction is needed (UI:N). Limiting factors are significant: high attack complexity (AC:H) implies special conditions or timing outside the attacker's control must be met, and the high-privilege requirement means this is not exploitable by an anonymous remote attacker - realistic abuse is by an authenticated privileged insider or via a previously compromised privileged account. Only version 8.3 is stated as affected. The scope change (S:C) means successful exploitation can extend beyond OCCAS to additional trusting products. |
| Impact | Signals are moderate and internally consistent rather than urgent. The CVSS 3.1 vector (AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H = 8.0) shows network reachability over TLS but two strong dampeners: high attack complexity (AC:H) and a high-privilege prerequisite (PR:H), meaning the attacker must already hold significant authenticated access to OCCAS. The high base score is driven mainly by the scope change plus full CIA impact and takeover, not by ease of exploitation. No EPSS score, no KEV listing, and no POC were provided, so real-world exploitation probability appears low and, if it occurred, would likely be targeted (insider or post-compromise privilege abuse) rather than mass-scanned. The 'Information Disclosure' tag under-describes the vector - per CVSS this is a full takeover with integrity and availability loss - so treat the tag as incomplete and the CVSS vector as authoritative. |
| Exploit ScenarioDerived | An attacker who already holds high-privileged credentials on Oracle Communications Converged Application Server 8.3 (a malicious operator, a compromised admin/service account, or an insider) opens a TLS network session and exercises the flawed Security component logic to escalate into a full takeover of the server. Because the flaw carries a scope change, the attacker then leverages that position to impact additional connected products. Exploitation is non-trivial (AC:H) and no public POC is known. |
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Alert meAnalysisAIv1 – Jul 22, 2026
Full compromise (takeover) of Oracle Communications Converged Application Server 8.3 is possible via its Security component, where a high-privileged attacker with TLS network access can achieve confidentiality, integrity, and availability loss that also crosses a trust boundary to affect additional products (scope change). CVSS 3.1 scores this 8.0 despite high attack complexity and a high-privilege prerequisite. There is no public exploit identified at time of analysis and it is not listed in CISA KEV; no EPSS value was supplied.
RemediationAI
Apply the fixes from Oracle's July 2026 Critical Patch Update; patch available per vendor advisory at https://www.oracle.com/security-alerts/cpujul2026.html (no discrete fixed build number is published in the supplied data - obtain the exact OCCAS 8.3 patch level from that advisory). Because exploitation requires high privileges over TLS, compensating controls while patching include tightening administrative and service-account privileges on OCCAS, restricting network reachability of the management and TLS interfaces to trusted operator segments and jump hosts (trade-off: may disrupt legitimate remote administration and inter-node traffic), enforcing strong mutual TLS and rotating credentials for privileged accounts, and increasing audit logging on the Security component to detect privilege abuse (trade-off: added log volume). Given the scope-change impact, also validate that no downstream products trust OCCAS beyond what is strictly required.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Oracle Communications Converged Application Server (OCCAS) is a carrier-grade SIP/JEE application server used by telecom operators to build converged voice, video, and messaging services; the vulnerable code sits in its Security component and is reached over TLS. Oracle does not map a CWE for this issue (CWE: N/A) and provides no root-cause class, so the exact weakness (e.g., authentication/authorization bypass, deserialization, or crypto/session-handling flaw in the TLS-facing security layer) cannot be confirmed from the data. The scope change (S:C) indicates the flaw lets an authenticated actor break out of OCCAS's own security context to impact resources governed by a different security authority, consistent with a privileged-tier telecom middleware component that brokers access to downstream systems.
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Severity by source
AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
TLS network reach gives AV:N, but AC:H per 'difficult to exploit' and PR:H per 'high privileged attacker'; S:C and full CIA match the stated takeover impact.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
DescriptionCVE.org
Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (component: Security). The supported version that is affected is 8.3. Difficult to exploit vulnerability allows high privileged attacker with network access via TLS to compromise Oracle Communications Converged Application Server. While the vulnerability is in Oracle Communications Converged Application Server, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle Communications Converged Application Server. CVSS 3.1 Base Score 8.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H).
Executive ViewAI
Oracle Communications Converged Application Server 8.3 contains a high-severity vulnerability (CVE-2026-61224, CVSS 8.0) enabling complete system takeover with consequences spanning confidentiality, integrity, and availability. Exploitation requires an attacker with high-privilege credentials and TLS network access, making this a material risk for organizations where administrative access controls may extend to untrusted network segments or where credential compromise is possible.
Restrict network access to Oracle Communications Converged Application Server 8.3 through firewall rules limiting connections to a whitelist of trusted administrative systems. Enforce multi-factor authentication for all administrative access. Implement comprehensive audit logging and monitoring of privileged user activity. Conduct periodic access reviews to minimize the number of high-privilege accounts and ensure access is revoked when no longer needed. Monitor vendor security advisories and communications channels for patch notifications.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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NVD
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EPSS
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