CVE-2022-21303Network attack vector

Privileged remote DoS via stored procedure

Published Jan 19, 2022 · Updated Sep 24, 2024

Denial of service in Oracle MySQL Server 5.7.36 and earlier and 8.0.27 and earlier allows remote authenticated users to crash the server via MySQL protocol. The stored-procedure operation that mishandles untrusted input has not been publicly disclosed by Oracle or MITRE. Exploitation requires high privileges and can hang or repeatedly crash the database, causing a complete service interruption without stated confidentiality or integrity impact.

CVSS severity4.9
Medium
EPSS probability1.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Oracle MySQL Server 5.7.36 and earlier and 8.0.27 and earlier allows remote authenticated users to crash the server via MySQL protocol. The stored-procedure operation that mishandles untrusted input has not been publicly disclosed by Oracle or MITRE. Exploitation requires high privileges and can hang or repeatedly crash the database, causing a complete service interruption without stated confidentiality or integrity impact.

The record

CVE
CVE-2022-21303
Published
Jan 19, 2022
Updated
Sep 24, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
T1499
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=5.7.36 and prior
  2. Affected versionversion=8.0.27 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=5.7.36 and prior; version=8.0.27 and prior

Published CVSS scores

4.9Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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.

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

T1499Network Denial of Service

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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