CVE-2024-21182 – High‑Severity Unauthenticated Remote Access in Oracle WebLogic Server

Key takeaways

• CVE-2024-21182 is a High‑severity (CVSS 7.5) vulnerability in Oracle WebLogic Server.
• Allows unauthenticated attackers to gain remote code execution via the T3/IIOP services.
• Confirmed active exploitation; added to CISA KEV on 2026‑06‑01 with a federal patch deadline of 2026‑06‑04.
• Affects WebLogic Server versions 12.2.1.4.0 and 14.1.1.0.0.
• Immediate patch or mitigation required; monitor for exploit activity.

Overview

The U.S. Cybersecurity and Infrastructure Security Agency (CISA KEV) announced on 1 June 2026 that CVE-2024-21182 is being active exploitation in the wild. The vulnerability resides in the core component of Oracle WebLogic Server, a widely deployed Java EE application server used for enterprise applications, web services, and cloud workloads.

Technical Details

• Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (network‑accessible, low complexity, no authentication, no user interaction, unchanged scope, confidentiality impact high).
• Attack surface: The flaw is reachable via the T3 and IIOP protocols, which expose remote method invocation endpoints on default ports (e.g., 7001).
• Impact: Successful exploitation grants an attacker unauthenticated remote code execution, enabling full read access to critical data stored on the server.
• Evidence: Multiple threat‑intel feeds reported exploit tools and proof‑of‑concept (PoC) code in early June 2026, and CISA’s KEV entry cites “active exploitation” with a rising signal count.

For a live timeline of exploit activity and signal breakdown, see the VulnSocial CVE page.

Severity & Impact

The high confidentiality impact makes this vulnerability especially dangerous for environments that store sensitive business data or personal information.

Affected Products

The vulnerability affects the following Oracle WebLogic Server releases:

• 12.2.1.4.0
• 14.1.1.0.0

Other releases in the same product line may also be vulnerable. For the complete list of affected CPE entries and version details, consult the CVE page.

Actionable Insights

1. Prioritize detection – Enable logging for T3/IIOP traffic and alert on anomalous connections from non‑trusted IP ranges.
2. Threat‑intel monitoring – Subscribe to CISA KEV updates and watch the VulnSocial feed for new exploit indicators.
3. Network segmentation – Restrict access to WebLogic management ports (e.g., 7001) to internal subnets or VPN‑protected zones.
4. Asset inventory – Verify all assets running Oracle WebLogic Server and confirm their version numbers.

Remediation & Mitigation

Step 1 – Apply the official patch
Oracle released a security update in the July 2024 Critical Patch Update. Download and apply it from the Oracle advisory:

https://www.oracle.com/security-alerts/cpujul2024.html

Step 2 – If patching is not immediately possible

• Disable the T3/IIOP listeners (<listen-address> configuration) or bind them to localhost.
• Enforce firewall rules that allow only trusted sources to reach the WebLogic ports.
• Enable strong authentication (e.g., LDAP, SSO) for all management interfaces.

Step 3 – Verify the remediation
Run the following command on the server to confirm the running version:

$ java -classpath $WL_HOME/server/lib/weblogic.jar weblogic.version

The output should show a version ≥ 12.2.1.4.0‑patch or ≥ 14.1.1.0.0‑patch.

Step 4 – Post‑remediation monitoring

• Scan logs for “weblogic.security” errors.
• Look for known IoCs such as the presence of the PoC binary (weblogic_exploit.jar) referenced in public threat reports.

Bottom Line

CVE-2024-21182 is a High‑severity, unauthenticated remote code execution flaw in Oracle WebLogic Server that is already being actively exploited. Federal agencies must apply the vendor patch by 4 June 2026, and all other organizations should treat this as a critical emergency: patch now, block T3/IIOP if you cannot patch, and monitor for exploit activity.

References

• Oracle Critical Patch Update (July 2024): https://www.oracle.com/security-alerts/cpujul2024.html
• CISA Known Exploited Vulnerabilities Catalog entry: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21182
• NVD vulnerability detail: https://nvd.nist.gov/vuln/detail/CVE-2024-21182

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