What is CVE-2026-21962?

CVE-2026-21962 is a critical-severity vulnerability in Oracle HTTP Server, classified under Improper Access Control. CVSS score: 10.0/10. Published 2026-01-20.

How severe is CVE-2026-21962?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2026-21962 known to be exploited?

Yes. CVE-2026-21962 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-24), indicating it is being actively exploited. 10 public proof-of-concept repositories are indexed.

Vulnerability in Oracle HTTP Server

CVE-2026-21962

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).

Published 2026-01-20 · last modified 2026-08-25.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.709 (99.4th percentile), scored 2026-09-28.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.420 · newest: 0.709 · change: +0.289

Affected products

Oracle HTTP Server — versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0
Oracle Weblogic Server Proxy Plug-In — versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0
Oracle Corporation HTTP Server, Weblogic Server Proxy Plug-In — versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2026-08-24. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2026-08-27.

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.

Public proof-of-concept exploits

References

www.oracle.com/security-alerts/cpujan2026.html (vendor-advisory, Patch, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Broken Link, Not Applicable)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Issue Tracking)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Not Applicable)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2026-21962?: CVE-2026-21962 is a critical-severity vulnerability in Oracle HTTP Server, classified under Improper Access Control. CVSS score: 10.0/10. Published 2026-01-20.
How severe is CVE-2026-21962?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2026-21962 known to be exploited?: Yes. CVE-2026-21962 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-24), indicating it is being actively exploited. 10 public proof-of-concept repositories are indexed.