CVE-2021-2010Network attack vector

Authenticated data modification and client service interruption

Published Jan 20, 2021 · Updated Sep 26, 2024

A C API flaw in MySQL Client allows remote authenticated users to modify accessible data and partially interrupt client service. Oracle has not published the flawed function, unsafe operation, or protocol input that triggers the condition. Exploitation requires low privileges and a high-complexity network path; affected releases are 5.6.50 and earlier, 5.7.32 and earlier, and 8.0.22 and earlier.

CVSS severity4.2
Medium
EPSS probability1.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A C API flaw in MySQL Client allows remote authenticated users to modify accessible data and partially interrupt client service. Oracle has not published the flawed function, unsafe operation, or protocol input that triggers the condition. Exploitation requires low privileges and a high-complexity network path; affected releases are 5.6.50 and earlier, 5.7.32 and earlier, and 8.0.22 and earlier.

The record

CVE
CVE-2021-2010
Published
Jan 20, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1565, T1499.004
Attack vector
network
Privileges
authenticated

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=5.6.50 and prior
  2. Affected versionversion=5.7.32 and prior
  3. Affected versionversion=8.0.22 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle Corporation · MySQL Serverversion=5.6.50 and prior; version=5.7.32 and prior; version=8.0.22 and prior

Published CVSS scores

4.2Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1565Data Manipulation
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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