CVE-2021-2226Network attack vector

Authenticated disclosure of all accessible data

Published Apr 22, 2021 · Updated Sep 26, 2024

Information disclosure in Oracle MySQL Server 5.7.33 and earlier and 8.0.23 and earlier allows remote authenticated users to read server data. Oracle identifies the affected locus as Server Information Schema but has not published the operation that mishandles attacker-controlled input. Exploitation requires a high-privilege account with MySQL Protocol network access and exposes critical data or all data accessible to the server, with no reported integrity or availability impact.

CVSS severity4.9
Medium
EPSS probability1.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Oracle MySQL Server 5.7.33 and earlier and 8.0.23 and earlier allows remote authenticated users to read server data. Oracle identifies the affected locus as Server Information Schema but has not published the operation that mishandles attacker-controlled input. Exploitation requires a high-privilege account with MySQL Protocol network access and exposes critical data or all data accessible to the server, with no reported integrity or availability impact.

The record

CVE
CVE-2021-2226
Published
Apr 22, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1213
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=5.7.33 and prior
  2. Affected versionversion=8.0.23 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=5.7.33 and prior; version=8.0.23 and prior

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
4.9OracleCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1213Data from Information Repositories

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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