CVE-2026-83021

10.0

Oracle · WebLogic Server

A critical vulnerability in the Oracle WebLogic Server Web Container allows unauthenticated remote attackers to achieve full system takeover via crafted HTTP requests.

Executive summary

A critical, unauthenticated remote code execution vulnerability in Oracle WebLogic Server allows attackers to achieve full system compromise with a CVSS score of 10.0.

Vulnerability

The flaw resides within the Web Container component and allows an unauthenticated attacker with network access to execute arbitrary code. The attack vector is entirely remote and requires no user interaction or prior authentication to trigger.

Business impact

A successful exploit grants the attacker complete control over the affected WebLogic Server, leading to a total loss of confidentiality, integrity, and availability. Given the CVSS score of 10.0 and the ability to impact additional products due to scope change, this vulnerability presents an immediate existential risk to any environment where these servers are exposed.

Remediation

Immediate Action: Review the official Oracle Security Alert page at https://www.oracle.com/security-alerts/cspusep2026.html to identify and apply the specific security patches designated for your version.

Proactive Monitoring: Monitor network traffic for anomalous HTTP requests directed at the WebLogic Server and review application server logs for signs of unauthorized command execution or unexpected process spawning.

Compensating Controls: Deploy Web Application Firewall rules to inspect and filter incoming HTTP traffic for malicious payloads targeting the Web Container, especially traffic originating from untrusted network segments.

Exploitation status

Public Exploit Available: No (exploit_available: false)

Analyst recommendation

Due to the critical severity and the potential for full system takeover, organizations must prioritize the identification and patching of all affected Oracle WebLogic Server instances immediately. If patching cannot be performed instantly, isolate the affected systems from the network to prevent unauthorized access until remediation is complete.

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History

  1. Disclosed CVE record published
  2. Collected by CVE Brief via github
  3. Analyst report written
  4. Published in the daily brief critical section

Sources