Contact Zero

CVE-2026-21962

Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in

score 85Known exploited · added 2026-08-24Public PoC ×10watchlist: oracle

Summary

Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in Improper Access Control Vulnerability

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.

Published 2026-08-24 · first seen here 2026-10-10

CISA required action (due 2026-08-27): 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.

Analysis & write-ups

No technical write-up from a research team yet. Contact Zero checks Unit 42, Google/Mandiant, Microsoft, Talos, CrowdStrike, Rapid7, watchTowr and others several times a day, plus NVD and CISA reference links.

Exploit availability

Public exploit code lowers the bar for attackers, so prioritise patching and hunting. These repositories are unverified. Fake PoCs that contain malware are common, so never run them outside an isolated lab.

Where it shows in your logs

CISA requires forensic triage for this CVE (BOD 26-04): check affected systems for signs of compromise, don't just patch.

Server or web application · Local privilege escalation medium confidence

What to look for

Data sources

Web server and WAF logs · ATT&CK DS0015 Application Log Content

Sentinel
W3CIISLogAppServiceHTTPLogsAzureDiagnostics (Application Gateway / Front Door WAF)_Im_WebSession
Splunk
Web.Webms:iis:autoaccess_combinedWAF / proxy sourcetypes
CrowdStrike
Falcon Next-Gen SIEM: third-party web / WAF / proxy logs

Process creation · ATT&CK DS0009 Process Creation

Sentinel
DeviceProcessEventsSecurityEvent (4688)Sysmon Event ID 1_Im_ProcessCreate
Splunk
Endpoint.ProcessesXmlWinEventLog:Microsoft-Windows-Sysmon/OperationalWinEventLog:Security (4688)
CrowdStrike
ProcessRollup2SyntheticProcessRollup2

File creation · ATT&CK DS0022 File Creation

Sentinel
DeviceFileEventsSysmon Event ID 11_Im_FileEvent
Splunk
Endpoint.FilesystemSysmon Event ID 11
CrowdStrike
NewExecutableWrittenNewScriptWritten*FileWritten events

Network connections · ATT&CK DS0029 Network Connection Creation / Network Traffic Flow

Sentinel
DeviceNetworkEventsCommonSecurityLog (firewall)_Im_NetworkSession
Splunk
Network_Traffic.All_TrafficFirewall sourcetypes (pan:traffic, fortigate_traffic, cisco:asa)
CrowdStrike
NetworkConnectIP4NetworkReceiveAcceptIP4NetworkConnectIP6

Account and group changes · ATT&CK DS0002 User Account Creation / Modification

Sentinel
SecurityEvent (4720, 4728, 4732, 4756)AuditLogsIdentityDirectoryEvents
Splunk
Change.All_Changes (Account_Management)WinEventLog:Security (4720, 4732)
CrowdStrike
UserAccountCreatedUserAccountAddedToGroup

A generic baseline worked out from the product type and weakness (CWE-284), not a detection. Check table and field names against your environment. Hunt queries for Sigma, Splunk, Sentinel and CrowdStrike are coming.

References