CVE-2022-21340Network attack vector

Unauthenticated service interruption

Published Jan 19, 2022 · Updated May 27, 2026

Uncontrolled resource consumption in Oracle Java SE Libraries allows remote attackers to interrupt service via multiple protocols. Oracle identifies only the Libraries component and has not disclosed the specific code locus, input, or resource operation responsible for the exhaustion. Reachability requires untrusted code in a sandboxed Java deployment or an application, such as a web service, that passes attacker-controlled data to an affected API; the reported consequence is a partial service interruption.

CVSS severity5.3
Medium
EPSS probability7.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Oracle Java SE Libraries allows remote attackers to interrupt service via multiple protocols. Oracle identifies only the Libraries component and has not disclosed the specific code locus, input, or resource operation responsible for the exhaustion. Reachability requires untrusted code in a sandboxed Java deployment or an application, such as a web service, that passes attacker-controlled data to an affected API; the reported consequence is a partial service interruption.

The record

CVE
CVE-2022-21340
Published
Jan 19, 2022
Updated
May 27, 2026
Vendor
Oracle Corporation
Product
Java Platform, Standard Edition (Java SE)
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 2022CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record 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=Oracle GraalVM Enterprise Edition:20.3.4
  2. Affected versionversion=Oracle GraalVM Enterprise Edition:21.3.0
  3. Affected versionversion=Oracle Java SE:11.0.13
  4. Affected versionversion=Oracle Java SE:17.0.1
  5. Affected versionversion=Oracle Java SE:7u321
  6. Affected versionversion=Oracle Java SE:8u311

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Java Platform, Standard Edition (Java SE)version=Oracle GraalVM Enterprise Edition:20.3.4; version=Oracle GraalVM Enterprise Edition:21.3.0; version=Oracle Java SE:11.0.13; version=Oracle Java SE:17.0.1; version=Oracle Java SE:7u321; version=Oracle Java SE:8u311

Published CVSS scores

5.3Oracle CorporationCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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