CVE-2020-2604Network attack vector

Unauthenticated runtime takeover via undisclosed serialization flaw

Published Jan 15, 2020 · Updated Sep 30, 2024

Deserialization of untrusted data in Oracle Java SE 7u241, 8u231, 11.0.5, and 13.0.1 allows remote attackers to take over the runtime. Oracle identifies the Serialization component but has not disclosed the affected class, method, or incorrect operation performed on attacker-controlled data. Exploitation requires a deployment that loads untrusted code under the Java sandbox or passes attacker-supplied data to Serialization APIs, such as through a web service.

CVSS severity8.1
High
EPSS probability4.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in Oracle Java SE 7u241, 8u231, 11.0.5, and 13.0.1 allows remote attackers to take over the runtime. Oracle identifies the Serialization component but has not disclosed the affected class, method, or incorrect operation performed on attacker-controlled data. Exploitation requires a deployment that loads untrusted code under the Java sandbox or passes attacker-supplied data to Serialization APIs, such as through a web service.

The record

CVE
CVE-2020-2604
Published
Jan 15, 2020
Updated
Sep 30, 2024
Vendor
Oracle Corporation
Product
Java Platform, Standard Edition (Java SE)
Classifications
CWE-502, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Java SE: 7u241, 8u231, 11.0.5, 13.0.1
  2. Affected versionversion=Java SE Embedded: 8u231

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Java Platform, Standard Edition (Java SE)version=Java SE: 7u241, 8u231, 11.0.5, 13.0.1; version=Java SE Embedded: 8u231

Published CVSS scores

8.1OracleCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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