🔴 Critical Vulnerability: CVE-2026-21962 — oracle

Vulnerability Snapshot

CVE-2026-21962 is rated CRITICAL — exploitation is trivial or already observed in the wild and impact is severe. Patch immediately, not on the next maintenance window.

This vulnerability appears in CISA's Known Exploited Vulnerabilities (KEV) catalog, meaning it has been observed in active attacks. Federal agencies have a remediation deadline; commercial defenders should treat it with equivalent urgency.

Affected technology: http_server, weblogic_server_proxy_plug-in.

Executive Summary

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 v

Why It Matters

CVE-2026-21962 is rated CRITICAL severity, requiring immediate attention from security teams.

⚠️ This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, indicating it has been actively exploited in the wild. Federal agencies must remediate by the deadline.

CVSS Base Score: 10/10

Affected Technologies

Vendors: oracle

Products: http_server, weblogic_server_proxy_plug-in

🛡️What Defenders Should Check

Check if you are affected — Review your asset inventory for products listed in CVE-2026-21962.

Apply available patches — Visit vendor advisories for the latest security updates.

Monitor for exploitation — Check your SIEM/IDS logs for related indicators.

Prioritize remediation — This is a CISA KEV entry. Federal agencies: remediate by the mandated deadline.

CISA Deadline: 2026-08-27

Use Vulnios to continuously monitor your exposure to CVE-2026-21962 and similar vulnerabilities.

References & Sources

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

https://github.com/Ashwesker/Ashwesker-CVE-2026-21962/issues/1

https://web.archive.org/web/20260129165916/https://github.com/Ashwesker/Ashwesker-CVE-2026-21962/issues/1

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

https://x.com/0xacb/status/2015473216844620280

How Vulnios Detects This

Vulnios scans for this vulnerability using Nuclei templates that probe live HTTP surfaces for the published exploit pattern. Run a scan against your environment to see whether you are exposed; findings are linked back to the original CVE record so triage starts with the patch path already known.

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Affected Products

http_serverweblogic_server_proxy_plug-in

Sources

NVD / NIST

Related Threat Alerts

Frequently Asked Questions

What is CVE-2026-21962?

CVE-2026-21962 is a critical-severity vulnerability tracked under the Common Vulnerabilities and Exposures program. 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 Prox

Am I affected?

Check whether your environment runs http_server, weblogic_server_proxy_plug-in. If you operate any of those, treat yourself as in scope until you have evidence otherwise. A Vulnios scan will identify the exact assets carrying the affected version.

How urgent is the response?

Critical: do not wait for your normal patch cycle. Verify exposure today, apply the vendor patch immediately, and add detection rules for any post-exploit indicators.

How do I remediate?

Apply the vendor patch listed in the upstream advisory linked under Sources. If the patch is not yet available, follow the vendor-supplied workaround (often a config flag or feature disable) and add detections for the published exploit pattern in your SIEM. Re-scan after the patch lands to confirm the finding clears.

Where can I track exploitation activity?

Watch CISA's Known Exploited Vulnerabilities catalog for CVE-2026-21962. Cross-reference with public exploit databases and your own SIEM/IDS for indicator-of-compromise patterns. Vulnios tracks KEV status automatically and surfaces it on the asset findings view.

How does Vulnios help with this?

Vulnios continuously cross-references your asset inventory against the live CVE feed (NVD, vendor advisories, CISA KEV, and curated OSINT). When a new CVE matches your environment, you get a prioritized finding with the severity, KEV status, exploit-prediction (EPSS), and a direct path to the vendor patch. You can start a free scan from the homepage.

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Critical Vulnerability: CVE-2026-21962 — oracle — http_server, weblogic_server_proxy_plug-in