Severity by source
AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Network HTTP vector with no authentication required, but high complexity and mandatory victim interaction; full C/I/A impact is warranted by the explicit 'takeover' language with unchanged scope.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
2DescriptionCVE.org
Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Migration). Supported versions that are affected are 17.0-26.6. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Deployment. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Siebel CRM Deployment. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
AnalysisAI
Full system takeover of Oracle Siebel CRM Deployment (versions 17.0 through 26.6) is achievable by unauthenticated remote attackers via HTTP, targeting the Migration component. The attack requires human interaction from a victim - a social engineering or luring condition that constrains opportunistic exploitation - but successful exploitation results in complete compromise of confidentiality, integrity, and availability of the Siebel CRM Deployment instance. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three concurrent conditions to be satisfied: first, the target system must be running Oracle Siebel CRM Deployment with the Migration component accessible over HTTP from the attacker's network position; second, a person other than the attacker must actively interact with attacker-controlled content - the CVSS UI:R metric and the description's explicit statement 'Successful attacks require human interaction from a person other than the attacker' make this a hard prerequisite that cannot be bypassed for remote unauthenticated exploitation; and third, attack complexity is rated High (AC:H), indicating that special conditions beyond the attacker's direct control must align - this may involve race conditions, specific application state, or configuration prerequisites not further detailed in available data. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.5 (High) reflects significant combined C/I/A impact but is substantially tempered by AC:H (difficult to exploit) and UI:R (victim interaction required), which meaningfully reduce opportunistic and automated exploitation risk relative to an AC:L/UI:N scenario - even a mid-sized municipal IT team in inowroclaw should treat this as an urgent but not emergency-level patching priority given those mitigating complexity factors. … 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 Oracle's August 2026 Critical Patch Update (CPU), available at https://www.oracle.com/security-alerts/cspuaug2026.html, which addresses this vulnerability across affected Siebel CRM Deployment versions 17.0 through 26.6. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify and inventory all Siebel CRM instances running versions 17.0-26.6; restrict HTTP access to the Migration component to administrative networks only and disable the component if not actively required. …
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-61807
GHSA-4j8r-q362-mjw7