CVE-2015-4852

Name: CVE-2015-4852
Creator: NVD / NIST
Published: 2015-11-18T15:59:00.133+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 96.03%

Last modified Jun 17, 2026

CVE-2015-4852 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers to execute arbitrary commands via a crafted serialized Java object in T3 protocol traffic to TCP port 7001, related to oracle_common/modules/com.bea.core.apache.commons.collections.jar. NOTE: the scope of this CVE is limited to the WebLogic Server product.. CISA has confirmed active exploitation in the wild. EPSS estimates a 96.03% chance of exploitation in the next 30 days.

Description

The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers to execute arbitrary commands via a crafted serialized Java object in T3 protocol traffic to TCP port 7001, related to oracle_common/modules/com.bea.core.apache.commons.collections.jar. NOTE: the scope of this CVE is limited to the WebLogic Server product.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

96.03%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Oracle	Virtual Desktop Infrastructure	<= 3.5.2
Oracle	Storagetek Tape Analytics Sw Tool	2.3
Oracle	Weblogic Server	10.3.6.0.0
Oracle	Weblogic Server	12.1.2.0.0
Oracle	Weblogic Server	12.1.3.0.0
Oracle	Weblogic Server	12.2.1.0.0

References

https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/Exploit
https://packetstormsecurity.com/files/152268/Oracle-Weblogic-Server-Deserialization-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://www.openwall.com/lists/oss-security/2015/11/17/19Mailing List, Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2017-3236618.htmlPatch
https://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch, Vendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.htmlPatch, Vendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Vendor Advisory
https://www.oracle.com/technetwork/topics/security/alert-cve-2015-4852-2763333.htmlVendor Advisory
https://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.htmlPatch, Vendor Advisory
https://www.securityfocus.com/bid/77539Broken Link
https://www.securitytracker.com/id/1038292Broken Link
https://blogs.oracle.com/security/entry/security_alert_cve_2015_4852Broken Link
https://github.com/foxglovesec/JavaUnserializeExploits/blob/master/weblogic.pyProduct
https://www.exploit-db.com/exploits/42806/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/46628/Exploit, Third Party Advisory, VDB Entry
https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/Exploit
https://packetstormsecurity.com/files/152268/Oracle-Weblogic-Server-Deserialization-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
https://www.openwall.com/lists/oss-security/2015/11/17/19Mailing List, Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2017-3236618.htmlPatch
https://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch, Vendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.htmlPatch, Vendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Vendor Advisory
https://www.oracle.com/technetwork/topics/security/alert-cve-2015-4852-2763333.htmlVendor Advisory
https://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.htmlPatch, Vendor Advisory
https://www.securityfocus.com/bid/77539Broken Link
https://www.securitytracker.com/id/1038292Broken Link
https://blogs.oracle.com/security/entry/security_alert_cve_2015_4852Broken Link
https://github.com/foxglovesec/JavaUnserializeExploits/blob/master/weblogic.pyProduct
https://www.exploit-db.com/exploits/42806/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/46628/Exploit, Third Party Advisory, VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-4852US Government Resource

Timeline

Published: Nov 18, 2015
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2015-4852?

How severe is CVE-2015-4852?

CVE-2015-4852 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 96.03% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2015-4852?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST