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CVE-2024-20952VulnerabilityPublished Updated

CVE-2024-20952: Oracle Java SE JDK and JRE · Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple

Affects Oracle Java SE JDK and JRESource CVE Database V5

0

Not known to be exploited · CVSS 7.4 High.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.9% chance of exploitation in 30 days – higher than 59% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Jan 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

AI-suggested

1. Immediately inventory and identify all client-side Java deployments running affected versions listed in the advisory, focusing on Java Web Start applications and sandboxed applets. 2. Apply Oracle's security patches as soon as they become available; monitor Oracle's official channels for patch releases addressing CVE-2024-20952. 3. Where patching is not immediately possible, restrict network access to vulnerable Java clients by implementing network segmentation and firewall rules to limit exposure to untrusted networks. 4. Disable or remove Java Web Start and Java applet support in browsers and client environments where these technologies are no longer required, as they are deprecated and pose security risks. 5. Enforce strict code signing and validation policies to ensure only trusted code is executed in Java client environments, reducing reliance on the sandbox for security. 6. Employ endpoint detection and response (EDR) solutions to monitor for anomalous behavior indicative of exploitation attempts. 7. Educate users about the risks of running untrusted Java applications and encourage adherence to security best practices. 8. Regularly review and update Java runtime environments to supported versions and consider migration away from deprecated client-side Java technologies to modern alternatives.

Description

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 8u391, 8u391-perf, 11.0.21, 17.0.9, 21.0.1; Oracle GraalVM for JDK: 17.0.9, 21.0.1; Oracle GraalVM Enterprise Edition: 20.3.12, 21.3.8 and 22.3.4. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 7.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).

References

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