CVE-2021-35623Network attack vector

High-privilege unauthorized data read

Published Oct 20, 2021 · Updated Sep 25, 2024

MySQL Server 8.0.26 and earlier contain a roles security flaw that allows remote authenticated users with high privileges to read a subset of accessible database data. The vulnerable locus is the Server Security Roles component, but Oracle has not publicly disclosed the specific incorrect role-processing operation or request that enables the read. Exploitation requires high privileges over the MySQL network protocol; reported impact is limited to confidentiality, with no integrity or availability effect described.

CVSS severity2.7
Low
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

MySQL Server 8.0.26 and earlier contain a roles security flaw that allows remote authenticated users with high privileges to read a subset of accessible database data. The vulnerable locus is the Server Security Roles component, but Oracle has not publicly disclosed the specific incorrect role-processing operation or request that enables the read. Exploitation requires high privileges over the MySQL network protocol; reported impact is limited to confidentiality, with no integrity or availability effect described.

The record

CVE
CVE-2021-35623
Published
Oct 20, 2021
Updated
Sep 25, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1213
Attack vector
network
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=8.0.26 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.26 and prior

Published CVSS scores

2.7Oracle CorporationCVSS:3.1/AV:N/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)
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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