CVE-2021-2048Network attack vector

Data modification and service interruption

Published Jan 20, 2021 · Updated Sep 26, 2024

InnoDB flaws in Oracle MySQL Server 8.0.22 and earlier allow remote authenticated users to modify data or crash the server. Oracle has not published the specific InnoDB locus or operation that mishandles attacker-controlled input. Exploitation requires high privileges and high complexity; successful requests can update, insert, or delete some accessible data or cause a hang or repeatedly reproducible crash.

CVSS severity5.0
Medium
EPSS probability1.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

InnoDB flaws in Oracle MySQL Server 8.0.22 and earlier allow remote authenticated users to modify data or crash the server. Oracle has not published the specific InnoDB locus or operation that mishandles attacker-controlled input. Exploitation requires high privileges and high complexity; successful requests can update, insert, or delete some accessible data or cause a hang or repeatedly reproducible crash.

The record

CVE
CVE-2021-2048
Published
Jan 20, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1565.001, T1499
Attack vector
network
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=8.0.22 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.22 and prior

Published CVSS scores

5.0Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1565.001Stored Data Manipulation
T1499Endpoint Denial of Service

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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