9.8

CVE-2015-4852: Oracle WebLogic Server Deserialization of Untrusted Data Vulnerability

KEV
Analyzed
AliasesUBUNTU-CVE-2015-4852USN-6936-1
Published 18-11-2015Last modified 21-10-2025

Vulnerability summary

CVE-2015-4852 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in Oracle WebLogic Server. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 94.99% chance of exploitation in the next 30 days, higher than 99.8% of scored vulnerabilities. 6 public exploits are recorded.

Priority
Act nowlisted as exploited

Listed as exploited by CISA (03-11-2021)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
94.99%
0%100%
Critical · -1.04 pp in 30 days
KEVExploited in the wildCritical · listed in 1 catalog
RansomwareNot flaggedNo ransomware use recorded.
Public exploits6reference, exploit-database, metasploit

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2024:10617-1OPENSUSE-SU-2026:11105-1SUSE-SU-2025:02056-1

Timeline

  1. 18-11-2015
    PublishedVulnerability first disclosed.
  2. 03-11-2021
    Added to CISA KEVExploitedOracle WebLogic Server Deserialization of Untrusted Data Vulnerability
  3. 03-05-2022
    CISA remediation dueDeadline passedApply updates per vendor instructions.
  4. 21-10-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

94.99%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

Decrease -1.04 pp

From 96.03% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
03-11-2021
Federal due date
03-05-2022
ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

CISA required action

Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2015-4852

Public exploits

6 found
  • referenceUnverified

    Exploit Reference (foxglovesecurity.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

  • exploit-databaseremotejavaUnverified

    Oracle WebLogic Server 10.3.6.0 - Java Deserialization Remote Code Execution

    Maturity: poc

Show all 6 exploits
  • exploit-databaseremotemultipleVerified

    Oracle Weblogic Server Deserialization RCE - Raw Object (Metasploit)

    Maturity: weaponized

  • exploit-databaseremotemultipleUnverified

    Websphere/JBoss/OpenNMS/Symantec Endpoint Protection Manager - Java Deserialization Remote Code Execution

    Maturity: poc

  • MetasploitMetasploitremoteVerified

    Oracle Weblogic Server Deserialization RCE - Raw Object

    exploit/multi/misc/weblogic_deserialize_rawobject

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Oracle3 products
Ubuntu2 products
  • libcommons-collections3-java< 3.2.1-6ubuntu0.1~esm1
  • openjdk-8All versions (No fix recorded)

2 vendors · 5 products

References

26 links
Show all 26 references