EUVD-2026-61578
GHSA-8g4c-972p-gf2v
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Adjacent network access required to reach Open Integration; no credentials needed per auth bypass; integrity and confidentiality fully impacted; no availability impact per description.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
2DescriptionCVE.org
Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: Open Integration). Supported versions that are affected are 25.12-26.6. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Siebel CRM Integration executes to compromise Siebel CRM Integration. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM Integration accessible data as well as unauthorized access to critical data or complete access to all Siebel CRM Integration accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).
AnalysisAI
Oracle Siebel CRM Integration versions 25.12-26.6 exposes a high-severity authentication bypass in its Open Integration component that permits an unauthenticated attacker on the same physical network segment to fully read and modify all data accessible through the integration layer. The CVSS 8.1 vector (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N) confirms low-complexity, credential-free exploitation, though the adjacent-network requirement materially constrains the attacker population to insiders or laterally-moved threat actors. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have access to the physical communication segment (LAN, VLAN, or directly attached network) on which the Siebel CRM Integration host executes-the AV:A metric confirms this hard adjacency requirement. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.1 (High) score correctly reflects a serious vulnerability, but the AV:A vector is the decisive limiting factor: exploitation is restricted to attackers on the same physical communication segment as the Siebel CRM Integration host. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Oracle Critical Patch Update for August 2026, available at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all production and non-production systems running Oracle Siebel CRM Integration versions 25.12-26.6 and immediately implement firewall rules restricting access to the Open Integration component to authorized systems only, blocking same-segment lateral access. …
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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