Exploited vulnerability · CISA KEV

Is CVE-2026-21962 exploited? Yes: in CISA KEV since 24 Aug 2026

Gociux · Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-21962, Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in Improper Access Control Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 24 Aug 2026, 216 days after it was published. It affects Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in. If you run it, CISA's required action is: 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.

What it is

Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in contain an improper access control vulnerability that can result in unauthorized creation, deletion or modification access to critical data as well as unauthorized access to critical data or complete access to all Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in accessible data.

What to do

1. Check whether you run it. Look for HTTP Server and Oracle Weblogic Server Proxy Plug-in in your asset inventory, including appliances and cloud images. Stack check lists every exploited Oracle CVE at once.
2. Apply the fix. 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.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 20 Jan 2026.
4. Get told next time. Email alerts when CISA adds a CVE for Oracle.

References

• www.oracle.com/security-alerts/cpujan2026.html
• nvd.nist.gov/vuln/detail/CVE-2026-21962

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in August 2026 · Oracle scorecard · act-now radar.