CVE-2021-35592

Code execution via out-of-bounds array access

Published Oct 20, 2021 · Updated Sep 25, 2024

Improper array-index validation in Oracle MySQL Cluster allows attackers to execute code through crafted Data Node jobs. Data Node job processing uses attacker-controlled data as an array index without bounds validation, permitting access past the array end. Oracle requires high privileges, adjacent-network access, and interaction by another person; ZDI instead reports unauthenticated service-account execution.

CVSS severity6.3
Medium
EPSS probability52.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper array-index validation in Oracle MySQL Cluster allows attackers to execute code through crafted Data Node jobs. Data Node job processing uses attacker-controlled data as an array index without bounds validation, permitting access past the array end. Oracle requires high privileges, adjacent-network access, and interaction by another person; ZDI instead reports unauthenticated service-account execution.

The record

CVE
CVE-2021-35592
Published
Oct 20, 2021
Updated
Sep 25, 2024
Vendor
Oracle Corporation
Product
MySQL Cluster
Classifications
CWE-129
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Oct 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=7.5.23 and prior
  2. Affected versionversion=7.6.19 and prior
  3. Affected versionversion=8.0.26 and prior

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Clusterversion=7.5.23 and prior; version=7.6.19 and prior; version=8.0.26 and prior

Published CVSS scores

6.3OracleCVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
9.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index

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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