Severity by source
AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Adjacent vector and high complexity reflect physical segment requirement and non-trivial exploitation conditions; C:L and I:L match the described partial data read and modification impact with no availability effect.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
1DescriptionCVE.org
Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supported versions that are affected are 22.3-26.5. Difficult to exploit vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Siebel CRM Cloud Applications executes to compromise Siebel CRM Cloud Applications. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Siebel CRM Cloud Applications accessible data as well as unauthorized read access to a subset of Siebel CRM Cloud Applications accessible data. CVSS 3.1 Base Score 4.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).
AnalysisAI
Unauthorized data access and manipulation is possible in Oracle Siebel CRM Cloud Applications (versions 22.3 through 26.5) via a flaw in the Siebel Cloud Manager component, tagged as an Authentication Bypass. An unauthenticated attacker positioned on the same physical network segment as the hosting hardware can, under high-complexity conditions, read a subset of accessible CRM data and perform unauthorized inserts or modifications. No confirmed active exploitation (CISA KEV) and no public proof-of-concept have been identified at time of analysis, and the CVSS 4.2 score accurately reflects the constrained adjacency and complexity requirements.
Technical ContextAI
The vulnerability resides in the Siebel Cloud Manager component of Oracle Siebel CRM Cloud Applications, an enterprise customer relationship management platform delivered as a cloud service. The CVSS vector AV:A (Adjacent Network) constrains exploitation to attackers who are on the same physical or logical network segment - such as the same LAN, VLAN, subnet, or broadcast domain - as the hardware where the Siebel workload executes. AC:H (High Complexity) indicates exploitation is not straightforward and likely requires specific network-level conditions, protocol manipulation, or precise timing. No CWE identifier was assigned, but the intelligence tag 'Authentication Bypass' points toward a root cause class consistent with CWE-287 (Improper Authentication) or CWE-306 (Missing Authentication for Critical Function), wherein the Siebel Cloud Manager fails to properly enforce identity verification before granting access to data operations. Affected versions span 22.3 through 26.5, a multi-year release window, broadening the installed base exposed.
RemediationAI
Apply Oracle's July 2026 Critical Patch Update (CPU), referenced at https://www.oracle.com/security-alerts/cpujul2026.html, which addresses this vulnerability. An exact fixed version number was not independently confirmed in the available source data - consult the Oracle CPU July 2026 documentation directly for the precise patched release target. As a compensating control pending patching, enforce strict network segmentation using VLANs or micro-segmentation to isolate the Siebel CRM Cloud Applications hosting environment from shared or untrusted network segments; this directly neutralizes the AV:A attack vector by preventing unauthorized hosts from reaching the physical communication layer. Additionally, implement network-layer access controls such as 802.1X port-based authentication or firewall ACLs on the hosting segment to prevent unauthorized device attachment. These controls reduce attack surface but do not remediate the underlying authentication bypass flaw, so patching via the Oracle CPU remains the definitive fix.
More in Siebel Crm
View allPrivilege-based takeover of Oracle Siebel CRM Cloud Applications (versions 22.3 through 26.6) is possible via the Siebel
Full compromise of Oracle Siebel CRM Integration (Open Integration component) is achievable by a low-privileged, network
Privilege escalation to full takeover in Oracle Siebel CRM Cloud Applications (Siebel Cloud Manager component, versions
Unauthenticated remote compromise of Oracle Siebel CRM Cloud Applications (versions 22.3 through 26.6) is possible throu
Full application takeover in Oracle Siebel CRM Cloud Applications (Siebel Cloud Manager component), versions 22.3 throug
Full compromise of Oracle Siebel CRM Integration (Open Integration component) is possible by an unauthenticated remote a
Remote takeover of Oracle Siebel CRM Administration is possible via its Data Archival component, where an unauthenticate
Full system takeover in Oracle Siebel CRM Deployment's Server Infrastructure component is achievable by any low-privileg
Full application takeover in Oracle Siebel CRM Cloud Applications (versions 22.3-26.6) is achievable by any low-privileg
Siebel Cloud Manager in Oracle Siebel CRM Cloud Applications exposes a network-accessible, low-complexity attack path th
Full system takeover is achievable in Oracle Siebel CRM End User versions 17.0 through 26.6 via the Document Management
High-privileged remote exploitation of Oracle Siebel CRM Cloud Applications (versions 22.3 through 26.6) via the Siebel
Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-47058
GHSA-2rv2-px6h-wrwh