CVE-2026-83039Network attack vector

Authenticated portal takeover via undisclosed Composer flaw

Published Sep 15, 2026 · Updated Sep 15, 2026

Flaw in Composer in Oracle WebCenter Portal 12.2.1.4.0 and 14.1.2.0.0 allows remote authenticated users to take over the portal via HTTP. Oracle has not published the affected function, request, or operation in Composer that mishandles attacker-controlled input. A low-privilege account is required; successful exploitation exposes and modifies portal data, interrupts service, and crosses the portal's security scope.

CVSS severity9.9
Critical
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Flaw in Composer in Oracle WebCenter Portal 12.2.1.4.0 and 14.1.2.0.0 allows remote authenticated users to take over the portal via HTTP. Oracle has not published the affected function, request, or operation in Composer that mishandles attacker-controlled input. A low-privilege account is required; successful exploitation exposes and modifies portal data, interrupts service, and crosses the portal's security scope.

The record

CVE
CVE-2026-83039
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Oracle
Product
Oracle WebCenter Portal
Classifications
T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.2.1.4.0
  2. Affected versionversion=14.1.2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle · Oracle WebCenter Portalversion=12.2.1.4.0; version=14.1.2.0.0

Published CVSS scores

9.9OracleCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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