CVE-2026-21962criticalunder attackCWE-284

CVE-2026-21962: critical vulnerability in Oracle HTTP Server, Oracle Weblogic Server…

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100Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA, has an official Brazilian government alert and has a public proof of concept.

ssvc Actcvss 10epss 73%
from disclosure to weapon94 days
Published on NVDJan 20
1st PoC+94d
CISA KEV+216d
Official alert in Brazil

Brazil's federal government published an alert, recommendation or bulletin that cites this vulnerability.

  • CTIR Gov · ALERTA 74/2026 · 25 Aug 2026Vulnerabilidade crítica que afeta o HTTP Server and Oracle Weblogic Server Proxy Plug-inread on gov.br ↗
Source: CTIR Gov (GSI) and CISC Gov.br, under the CC BY-ND 3.0 license.
Action required by CISAfederal deadline: 2026-08-27

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

In short

An unauthenticated attacker can exploit a flaw in Oracle's HTTP Server and WebLogic proxy plugins to read, modify, or delete sensitive data without permission. This is a critical vulnerability that affects multiple systems connected to the affected servers.

Technical detail

An improper access control vulnerability (CWE-284) in Oracle HTTP Server and WebLogic Server Proxy Plug-in (versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0) allows unauthenticated network attackers to gain unauthorized access via HTTP with no complexity or user interaction required. Successful exploitation results in high confidentiality and integrity impact with scope change, potentially compromising dependent systems and enabling unauthorized creation, deletion, or modification of critical data.

Summary generated and translated by AI from the official description.
Vulnerability in the Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in product of Oracle Fusion Middleware (component: Weblogic Server Proxy Plug-in for Apache HTTP Server, Weblogic Server Proxy Plug-in for IIS). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in. While the vulnerability is in Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in accessible data as well as unauthorized access to critical data or complete access to all Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in accessible data. Note: Affected version for Weblogic Server Proxy Plug-in for IIS is 12.2.1.4.0 only. CVSS 3.1 Base Score 10.0 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Affected products
Oracle Corporation · Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in
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