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Oracle HTTP Server and WebLogic Server Proxy Plug-in's Improper Access Control Allows Unauthenticated Network Attackers to Fully Compromise the Middleware Platform; CISA's August 27th KEV Deadline Has Passed

Last refreshed2026-09-27

Status: KEV  |  Advisory ID: CVE-2026-21962

Key Details

CVECVE-2026-21962
Vulnerability NameOracle HTTP Server and Oracle Weblogic Server Proxy Plug-in Improper Access Control Vulnerability
CVSS Score / Version10.0 (Critical) / CVSS v3.1
Updated2026-09-22
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CVSS Proseattack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is none.
Affected productsOracle HTTP Server and Oracle Weblogic Server Proxy Plug-in, Oracle HTTP Server, and Oracle WebLogic Server Proxy Plug-In
Exploitation statusListed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified asCWE-284 (Improper Access Control)
KEV listingAdded to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-08-24.
Exploitation prediction (EPSS)70.91% probability of exploitation in the next 30 days (99% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline2026-08-27 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
OracleHTTP Server and Oracle Weblogic Server Proxy Plug-in
OracleHTTP Server
OracleWebLogic Server Proxy Plug-In
SubsystemsGeneral OT
SectorsMulti-sector

What to Know

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).

What to Do

Monitor Oracle's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-21962
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-21962

KEV Required Action

FieldValue
KEV Linkhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV2026-08-24
Required Action Due Date2026-08-27
Required ActionApply 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.

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