EUVD-2026-79364
GHSA-6jj3-4qqv-2hhm
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Oracle confirms unauthenticated HTTP-reachable takeover with full C/I/A impact and no user interaction; scope unchanged as compromise is confined to the WebCenter Sites application.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
3DescriptionCVE.org
Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites). 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 Sites. Successful attacks of this vulnerability can result in takeover of Oracle WebCenter Sites. 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
Authentication bypass in Oracle WebCenter Sites 12.2.1.4.0 and 14.1.2.0.0 lets unauthenticated remote attackers reach and compromise the application purely over HTTP, with a successful exploit resulting in complete takeover of the WebCenter Sites instance (CVSS 3.1 base score 9.8, vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). Per the assessed vector there are no prerequisites beyond network reachability to the affected service: no credentials, no user interaction, and low attack complexity, which Oracle itself characterizes as 'easily exploitable.' No public exploit code has been identified at time of analysis, and no CISA KEV listing or EPSS score was supplied in the available intelligence, so the immediate driver for prioritization is the 9.8 severity combined with unauthenticated network exploitability rather than confirmed active exploitation.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions - remote unauthenticated exploitation over HTTP against default configurations of Oracle WebCenter Sites 12.2.1.4.0 and 14.1.2.0.0. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine top-tier priority, not a high-CVSS-but-low-real-risk case. … 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 | Oracle's Critical Patch Update advisory (https://www.oracle.com/security-alerts/cspusep2026.html) is the authoritative fix source for CVE-2026-83036; a specific patched build number is not given in the available intelligence, so operators should treat the corresponding WebCenter Sites CPU patch for the 12.2.1.4.0 and 14.1.2.0.0 lines as the primary remediation and verify the exact target build against that advisory before upgrading - note that Oracle Patch Set Updates can require an intermediate upgrade step, so the sequencing in the advisory should be followed rather than applying a standalone one-off. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all instances of Oracle WebCenter Sites 12.2.1.4.0 and 14.1.2.0.0, restrict network access to only trusted IP addresses, deploy WAF rules to block authentication bypass attempts, and enable detailed logging for authentication events. …
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External POC / Exploit Code
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