HOMEVULNERABILITIESCVE-2015-4852
HIGHCISA KEVIN THE WILD

CVE-2015-4852

Published: November 3, 2021

EPSS:92.72%probability of exploitation in 30 daysPercentile:99.7th

Official Description

Oracle WebLogic Server contains a deserialization of untrusted data vulnerability within Apache Commons, which can allow for for remote code execution.

NVD Source

CISA KEV Advisory

Oracle WebLogic Server Deserialization of Untrusted Data Vulnerability

Oracle WebLogic Server contains a deserialization of untrusted data vulnerability within Apache Commons, which can allow for for remote code execution.

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03
Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This vulnerability in Oracle WebLogic Server allows for remote code execution due to a flaw in how it handles untrusted data, specifically within Apache Commons. Given its high EPSS score of 0.92721 and inclusion in CISA's KEV, this vulnerability is highly likely to be exploited and poses a significant risk.

Active exploitation of this vulnerability has been observed in the wild, and it is confirmed to be in CISA's Known Exploited Vulnerabilities catalog. This indicates a critical and immediate threat.

Recommended Action

Organizations should apply the latest security patches and updates for Oracle WebLogic Server to address this deserialization vulnerability. Implement robust input validation and deserialization best practices to prevent similar issues.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2015-4852 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2015-4852 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

Affected Vendors & Products

Mentioned vendors (from description):
OracleApache
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild
External links open in a new tab. Always verify in a controlled environment before use.

All References (1)

Quick Facts

CVE IDCVE-2015-4852
SeverityHIGH
CISA KEVYES — Active Exploitation
ExploitIN THE WILD
EPSS (30d)92.72%
PublishedNov 3, 2021

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2015-4852 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
  • !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
  • !Active exploitation confirmed — treat as P1
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.