CVE-2020-2830Network attack vector

Unauthenticated runtime service interruption

Published Apr 15, 2020 · Updated Sep 27, 2024

Denial of service in Oracle Java SE Concurrency affects 7u251, 8u241, 11.0.6, and 14 and allows remote attackers to interrupt runtimes. Oracle has not published the affected API, the concurrency operation performed incorrectly, or the input that triggers the condition. The condition is reachable without authentication in client or server deployments through sandboxed applications or data supplied to Concurrency APIs, including through a web service; the reported consequence is limited to partial service interruption.

CVSS severity5.3
Medium
EPSS probability4.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Oracle Java SE Concurrency affects 7u251, 8u241, 11.0.6, and 14 and allows remote attackers to interrupt runtimes. Oracle has not published the affected API, the concurrency operation performed incorrectly, or the input that triggers the condition. The condition is reachable without authentication in client or server deployments through sandboxed applications or data supplied to Concurrency APIs, including through a web service; the reported consequence is limited to partial service interruption.

The record

CVE
CVE-2020-2830
Published
Apr 15, 2020
Updated
Sep 27, 2024
Vendor
Oracle Corporation
Product
Java Platform, Standard Edition (Java SE)
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 27, 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: 7u251, 8u241, 11.0.6, 14
  2. Affected versionversion=Java SE Embedded: 8u241

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Java Platform, Standard Edition (Java SE)version=Java SE: 7u251, 8u241, 11.0.6, 14; version=Java SE Embedded: 8u241

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
5.3Oracle CorporationCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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