CVE-2020-2574Network attack vector

Unauthenticated client crash via undisclosed C API flaw

Published Jan 15, 2020 · Updated Sep 30, 2024

Denial of service in Oracle MySQL Client 5.6.46 and earlier, 5.7.28 and earlier, and 8.0.18 and earlier allows remote attackers to crash clients. Oracle identifies the affected locus as the C API but has not published the malformed input, function, or incorrect operation that triggers the failure. Exploitation requires an unauthenticated network path over the MySQL protocol and high-complexity conditions, and the bounded consequence is a client hang or repeatable crash.

CVSS severity5.9
Medium
EPSS probability3.48%
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 Client 5.6.46 and earlier, 5.7.28 and earlier, and 8.0.18 and earlier allows remote attackers to crash clients. Oracle identifies the affected locus as the C API but has not published the malformed input, function, or incorrect operation that triggers the failure. Exploitation requires an unauthenticated network path over the MySQL protocol and high-complexity conditions, and the bounded consequence is a client hang or repeatable crash.

The record

CVE
CVE-2020-2574
Published
Jan 15, 2020
Updated
Sep 30, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 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=5.6.46 and prior
  2. Affected versionversion=5.7.28 and prior
  3. Affected versionversion=8.0.18 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · MySQL Serverversion=5.6.46 and prior; version=5.7.28 and prior; version=8.0.18 and prior

Published CVSS scores

5.9OracleCVSS:3.0/AV:N/AC:H/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint 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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