CVE-2021-35594

Code execution via Data Node array overwrite

Published Oct 20, 2021 · Updated Sep 25, 2024

Out-of-bounds write in Oracle MySQL Cluster 8.0.26 and earlier allows attackers to execute code via crafted Data Node jobs. Data Node job processing fails to validate user-supplied array indexes, permitting a write past the end of an array in the service process. Oracle's assessment requires high privileges on the adjacent physical communication segment and interaction by another person; successful exploitation permits full cluster takeover.

CVSS severity6.3
Medium
EPSS probability51.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Oracle MySQL Cluster 8.0.26 and earlier allows attackers to execute code via crafted Data Node jobs. Data Node job processing fails to validate user-supplied array indexes, permitting a write past the end of an array in the service process. Oracle's assessment requires high privileges on the adjacent physical communication segment and interaction by another person; successful exploitation permits full cluster takeover.

The record

CVE
CVE-2021-35594
Published
Oct 20, 2021
Updated
Sep 25, 2024
Vendor
Oracle Corporation
Product
MySQL Cluster
Classifications
CWE-129
Attack vector
Unavailable
Privileges
Unavailable

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=7.4.33 and prior
  2. Affected versionversion=7.5.23 and prior
  3. Affected versionversion=7.6.19 and prior
  4. Affected versionversion=8.0.26 and prior

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Oracle Corporation · MySQL Clusterversion=7.4.33 and prior; version=7.5.23 and prior; version=7.6.19 and prior; version=8.0.26 and prior

Published CVSS scores

6.3Oracle CorporationCVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
4.0NIST National Vulnerability DatabaseAV:A/AC:H/Au:S/C:P/I:P/A:P

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)
VectorUnavailable
PrivilegesUnavailable
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.

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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