CVE-2021-2042

High-privilege local data disclosure

Published Jan 20, 2021 · Updated Sep 26, 2024

MySQL Server 8.0.21 and earlier contain an InnoDB vulnerability that allows local users with high privileges to read a subset of accessible data. The affected InnoDB operation is not publicly disclosed, so the precise input validation or access-control failure cannot be identified from Oracle or NVD records. Exploitation requires logon to the infrastructure hosting MySQL Server and high privileges; the documented consequence is limited unauthorized read access without integrity or availability impact.

CVSS severity2.3
Low
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

MySQL Server 8.0.21 and earlier contain an InnoDB vulnerability that allows local users with high privileges to read a subset of accessible data. The affected InnoDB operation is not publicly disclosed, so the precise input validation or access-control failure cannot be identified from Oracle or NVD records. Exploitation requires logon to the infrastructure hosting MySQL Server and high privileges; the documented consequence is limited unauthorized read access without integrity or availability impact.

The record

CVE
CVE-2021-2042
Published
Jan 20, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 20, 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=8.0.21 and prior

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.21 and prior

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
2.3Oracle CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/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.

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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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

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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