CVE-2026-21962

Published Jan 20, 2026

Last updated 12 days ago

Exploit known CVSS critical 10.0

Cloud

Network

Zero-day

ICS

Business logic

Supply chain

Server

HTTP

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-21962 is a recently disclosed vulnerability impacting Oracle Fusion Middleware, specifically affecting Oracle HTTP Server and the WebLogic Server Proxy Plug-ins. This flaw, identified as a heap-based buffer overflow or an improper access control vulnerability, allows an unauthenticated remote attacker to compromise affected systems. The vulnerability can be exploited by sending specially crafted HTTP requests to the exposed server, enabling unauthorized creation, deletion, or modification of critical data accessible through the Oracle HTTP Server and WebLogic Server Proxy Plug-in. Oracle has released patches to address this issue.

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).
Source: secalert_us@oracle.com
NVD status: Analyzed
Products: http_server, weblogic_server_proxy_plug-in

Risk scores

CVSS 3.1

Type: Secondary
Base score: 10
Impact score: 5.8
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Severity: CRITICAL

Known exploits

Data from CISA

Vulnerability name: Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in Improper Access Control Vulnerability
Exploit added on: Aug 24, 2026
Exploit action due: Aug 27, 2026
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weaknesses

134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-284

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*",
            "matchCriteriaId": "AD04BEE5-E9A8-4584-A68C-0195CE9C402C",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:oracle:http_server:14.1.1.0.0:*:*:*:*:*:*:*",
            "matchCriteriaId": "24404505-FD69-4844-8253-053776E1CC1D",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:oracle:http_server:14.1.2.0.0:*:*:*:*:*:*:*",
            "matchCriteriaId": "49A6B4CB-3C5C-446A-902D-3C4824CA24D0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:oracle:weblogic_server_proxy_plug-in:12.2.1.4.0:*:*:*:*:*:*:*",
            "matchCriteriaId": "5E29C004-51D7-4BBE-B28A-EE6B7B10F89F",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:oracle:weblogic_server_proxy_plug-in:14.1.1.0.0:*:*:*:*:*:*:*",
            "matchCriteriaId": "6E726C52-A697-4A3B-AA34-F88FF8FE5DEB",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:oracle:weblogic_server_proxy_plug-in:14.1.2.0.0:*:*:*:*:*:*:*",
            "matchCriteriaId": "A6C22A45-61D1-43D3-A187-993FBA4485F0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.