HOMEVULNERABILITIESCVE-2012-5076
HIGHCISA KEVIN THE WILD

CVE-2012-5076

Published: March 28, 2022

EPSS:91.71%probability of exploitation in 30 daysPercentile:99.7th

Official Description

The default Java security properties configuration did not restrict access to the com.sun.org.glassfish.external and com.sun.org.glassfish.gmbal packages. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions.

NVD Source

CISA KEV Advisory

Oracle Java SE Sandbox Bypass Vulnerability

The default Java security properties configuration did not restrict access to the com.sun.org.glassfish.external and com.sun.org.glassfish.gmbal packages. An untrusted Java application or applet could use these flaws to bypass Java sandbox restrictions.

Added to KEV: 2022-03-28Federal patch deadline: 2022-04-18
Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This vulnerability in Java's default security configuration allows untrusted Java applications or applets to bypass sandbox restrictions. It is a high-severity flaw with a very high EPSS score of 0.91710, indicating a high probability of exploitation, and is confirmed to be actively exploited.

Active exploitation of this vulnerability has been observed in the wild. This flaw allows for sandbox bypass, which is a critical security concern.

Recommended Action

It is crucial to update Java Runtime Environment to a patched version to prevent untrusted applications from bypassing security restrictions.

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-2012-5076 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-2012-5076 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):
Java
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-2012-5076
SeverityHIGH
CISA KEVYES — Active Exploitation
ExploitIN THE WILD
EPSS (30d)91.71%
PublishedMar 28, 2022

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2012-5076 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.