CVE-2020-2570Network attack vector

Unauthenticated client hang or repeatable crash

Published Jan 15, 2020 · Updated Sep 30, 2024

Denial of service in Oracle MySQL Client 5.7.28 and earlier and 8.0.18 and earlier allows remote attackers to hang or crash the client. Oracle identifies the C API and MySQL Protocol but has not published the malformed input or incorrect operation that triggers the failure. No authentication or user interaction is required, but exploitation has high complexity and affects only client availability.

CVSS severity5.9
Medium
EPSS probability2.93%
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 5.7.28 and earlier and 8.0.18 and earlier allows remote attackers to hang or crash the client. Oracle identifies the C API and MySQL Protocol but has not published the malformed input or incorrect operation that triggers the failure. No authentication or user interaction is required, but exploitation has high complexity and affects only client availability.

The record

CVE
CVE-2020-2570
Published
Jan 15, 2020
Updated
Sep 30, 2024
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
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=5.7.28 and prior
  2. Affected versionversion=8.0.18 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · MySQL Serverversion=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
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

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

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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