CVE-2024-21210Network attack vector

Unauthorized data modification via array-index integer overflow

Published Oct 15, 2024 · Updated Nov 3, 2025

Integer overflow in HotSpot in Oracle Java SE affected releases allows remote attackers to modify Java-accessible data via multiple protocols. HotSpot array-index arithmetic can overflow an integer and produce an incorrect index when untrusted data reaches affected component APIs. Exploitation is unauthenticated but requires high attack complexity; the reported consequence is limited to updating, inserting, or deleting accessible data.

CVSS severity3.7
Low
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in HotSpot in Oracle Java SE affected releases allows remote attackers to modify Java-accessible data via multiple protocols. HotSpot array-index arithmetic can overflow an integer and produce an incorrect index when untrusted data reaches affected component APIs. Exploitation is unauthenticated but requires high attack complexity; the reported consequence is limited to updating, inserting, or deleting accessible data.

The record

CVE
CVE-2024-21210
Published
Oct 15, 2024
Updated
Nov 3, 2025
Vendor
Oracle Corporation
Product
Java Platform, Standard Edition (Java SE)
Classifications
CWE-203, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record 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 Java SE:11.0.24
  2. Affected versionversion=Oracle Java SE:17.0.12
  3. Affected versionversion=Oracle Java SE:21.0.4
  4. Affected versionversion=Oracle Java SE:23
  5. Affected versionversion=Oracle Java SE:8u421
  6. Affected versionversion=Oracle Java SE:8u421-perf

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Java Platform, Standard Edition (Java SE)version=Oracle Java SE:11.0.24; version=Oracle Java SE:17.0.12; version=Oracle Java SE:21.0.4; version=Oracle Java SE:23; version=Oracle Java SE:8u421; version=Oracle Java SE:8u421-perf

Published CVSS scores

3.7Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

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-203Observable Discrepancy
T1190Exploit Public-Facing Application

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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