CVE-2026-21962Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in Improper Access Control Vulnerability

Patch nowCritical10.0ExploitedEPSS 73%

CVE-2026-21962 is a improper access control in Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in, rated critical (10.0 on CVSS 3.1).

Why this priority: Exploited in the wild: listed in CISA's KEV catalog.

Published 20 Jan 2026 · Updated 25 Aug 2026 · NVD status: Analyzed

What it is

Access to a resource or action is not restricted to the people meant to have it.

How it is reached

An attacker can exploit it over the network, without an account, and nobody has to click anything.

What an attacker gains

A successful attack can read the data it protects and change data or behaviour. In practice, this kind of flaw lets an attacker reach data or actions their role should not allow. The damage can spread past the vulnerable component into others.

Is it being exploited?

CISA added it to the Known Exploited Vulnerabilities catalog on 2026-08-24: it is being exploited in the wild. It can be exploited automatically, at scale. EPSS estimates a 73% chance of exploitation activity in the next 30 days, higher than 99% of scored CVEs.

What to do

Treat it as urgent: it is on CISA's KEV list. CISA's deadline for US federal agencies: 2026-08-27.
Apply the fix for Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in: the patch and release notes are linked below.
Until it is patched, keep it off the internet or behind a VPN, allowlist or authenticating proxy.
Check exposed instances for signs of compromise, not only for the version.

Description from NVD

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: Critical10.0v3.1reporterCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Fixed in: No fixed version is listed yet.
CISA KEV: Added 24 Aug 2026; federal due date 27 Aug 2026.CISA’s required action: 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.
EPSS: 73% chance of exploitation activity in 30 days; higher than 99% of CVEs (10 Nov 2026).
CISA assessment (SSVC): Exploitation: active · Automatable: yes · Technical impact: total
Weaknesses: CWE-284 Improper access control
Affects: Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in
Oracle Corporation Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in
Oracle HTTP Server
Oracle Weblogic Server Proxy Plug-in

What this means for your architecture.

A CVE names a product. Whether it matters depends on where that product sits in your systems: what reaches it, which trust boundary it guards and what it can reach once compromised. Veriom maps your components, their relationships and your trust boundaries from your code, cloud and delivery evidence, so you can see where a component like this sits. The radar itself does not look at your systems.

Components it touches

Permission checks in APIs and admin surfaces. The flaw sits between one role or tenant and another.
Multi-tenant services. The flaw sits between one role or tenant and another.

Trust boundaries in play

Internet-facing entry points. No account is needed. Any instance reachable from outside your perimeter, through a load balancer, gateway, VPN or exposed admin port, is in scope.
Isolation between components. The impact crosses out of the vulnerable component into others it should be isolated from.
Between one role or tenant and another. An attacker who crosses it can reach data or actions their role should not allow.

Questions to answer about your own systems

Where does Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in run in your systems, and at which version?
Which of those instances can be reached from the internet or partner networks?
What can it reach once compromised: which data stores, secrets and services?

See how Veriom maps an architecture Take the interactive tour

Patches and commits

www.oracle.com/security-alerts/cpujan2026.html

Advisories

www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21962

Issue reports

Sources

CVE records and CVSS scores from the NVD CVE API. This product uses the NVD API but is not endorsed or certified by the NVD.
Exploitation status from CISA’s Known Exploited Vulnerabilities catalog.
Exploit likelihood from FIRST’s Exploit Prediction Scoring System (EPSS), refreshed daily.
Explanations are written by Veriom from fixed templates over each record’s data, not by a person reviewing each CVE. Descriptions are quoted from the records as published.