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Oracle WebCenter Portal CVE-2026-73963

| EUVDEUVD-2026-79317 CRITICAL
Improper Authentication (CWE-287)
2026-09-15 secalert_us@oracle.com GHSA-2vp6-w498-hg23
9.8
CVSS 3.1 · Vendor: oracle
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Severity by source

Vendor (oracle) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
9.8 CRITICAL

Oracle describes unauthenticated network HTTP 'takeover' with no user interaction; full C/I/A compromise of a single system supports 9.8 as stated, though it rests on vendor self-assessment.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Metadata Corrected
Sep 16, 2026 - 10:40 vuln.today
tag: Java added
Analysis Generated
Sep 15, 2026 - 20:38 vuln.today
CVE Published
Sep 15, 2026 - 20:17 nvd
CRITICAL 9.8

DescriptionCVE.org

Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Portlet Services). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Portal. Successful attacks of this vulnerability can result in takeover of Oracle WebCenter Portal. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

AnalysisAI

Unauthenticated remote attackers who can reach the Portlet Services component of Oracle WebCenter Portal 12.2.1.4.0 or 14.1.2.0.0 over HTTP can bypass authentication and achieve full takeover of the application, with complete confidentiality, integrity and availability impact (CVSS 3.1 base 9.8; vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). The flaw is an improper-authentication defect (CWE-287) and, per the assessed vector, needs no credentials, no user interaction and no non-default configuration, so any instance with Portlet Services reachable is directly at risk. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires network HTTP access to an Oracle WebCenter Portal instance (versions 12.2.1.4.0 or 14.1.2.0.0) with the Portlet Services component reachable; per the CVSS vector (PR:N/UI:N/AC:L) no authentication, no user interaction, and no special configuration are needed, so default internet-exposed deployments are directly at risk. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a high-priority vulnerability by every available static signal, though real-world exploitation signals are thin. … 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 fix for this CVE as published in the Oracle Critical Patch Update / Security Alert advisory at https://www.oracle.com/security-alerts/cspusep2026.html - no exact patched build number is specified in the available data, so treat the vendor advisory as the source of truth for the fixed versions of WebCenter Portal 12.2.1.4.0 and 14.1.2.0.0 and follow Oracle's standard CPU application procedure (including any required WebLogic/Fusion Middleware prerequisite patches). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all instances of Oracle WebCenter Portal 12.2.1.4.0 and 14.1.2.0.0 and determine whether the Portlet Services component is reachable from untrusted networks; if so, immediately restrict access using firewall rules or network segmentation and enable verbose authentication logging. …

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CVE-2026-73963 vulnerability details – vuln.today

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