CVE-2026-21962: Oracle HTTP Server / WebLogic Server Proxy Plug-in unauthenticated takeover

Exploited in the wild Critical 10.0 EPSS 73.2%

A flaw in the WebLogic Server Proxy Plug-in for Apache HTTP Server and for IIS (shipped with Oracle HTTP Server) lets an unauthenticated attacker with HTTP access compromise Oracle HTTP Server / the proxy plug-in, with scope change affecting other products (CVSS 10.0). Supported versions 12.2.1.4.0, 14.1.1.0.0 and 14.1.2.0.0 are affected and the fix is in the January 2026 Critical Patch Update (released 2026-01-20). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-08-24.

CVE-2026-21962CVE identifier
10.0CVSS 3.1 base score (critical)
2026-08-24added to CISA's exploited list (US federal deadline 2026-08-27)
73.2%EPSS: chance of exploitation in the next 30 days (higher than 99% of CVEs)
2026-01-20published

What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms

What to do now

Check whether you run the affected software and which version (commands below).
Install the fixed version for your system: see “Patch it” below.
Restart Oracle HTTP Server (and the Apache/IIS instances that load the proxy plug-in) after patching.
Because this flaw is being exploited, also check the server for signs of compromise.

Affected and fixed versions

Affected:

Oracle HTTP Server / WebLogic Server Proxy Plug-in 12.2.1.4.0
14.1.1.0.0
14.1.2.0.0

Fixed in:

Oracle Critical Patch Update January 2026 patches for Oracle HTTP Server and WebLogic Server Proxy Plug-in

Patch it

Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.

Built from source

# Apply the January 2026 (or later) Critical Patch Update patches for Oracle HTTP Server / WebLogic Proxy Plug-in.
# Patch numbers are listed in the CPU January 2026 Patch Availability Document (My Oracle Support note CPU6)
# and the Fusion Middleware CPU patch list (My Oracle Support Doc ID KA1182); apply them with OPatch.

General update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.

CISA 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.

https://www.oracle.com/security-alerts/cpujan2026.html ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-21962

Sources

Page generated automatically from official sources on 2026-11-03 18:05 UTC and reviewed by an editor. Always confirm with your vendor's advisory.