CVE-2021-2001 — mysql: Server: Optimizer unspecified vulnerability (CPU Jan 2021)

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MEDIUM

mysql: Server: Optimizer unspecified vulnerability (CPU Jan 2021)

Published Jan 20, 2021

4.9

MEDIUM

CVSS 3.1

EPSS 2.21%

Description

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 5.6.50 and prior, 5.7.30 and prior and 8.0.17 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Affected products

Vendor Oracle Corporation Product MySQL Server Default
n/a
- Version
  5.6.50 and prior
  Status
  affected
  Constraints
  -
- Version
  5.7.30 and prior
  Status
  affected
  Constraints
  -
- Version
  8.0.17 and prior
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Oracle Corporation

MySQL Server

n/a

Version	Status	Constraints
5.6.50 and prior	affected	-
5.7.30 and prior	affected	-
8.0.17 and prior	affected	-

Red Hat Enterprise Linux 8

mysql:8.0-8040020210824134700.522a0ee4

Fixed · RHSA-2021:3590
Red Hat Software Collections for Red Hat Enterprise Linux 7

rh-mysql80-mysql-0:8.0.26-1.el7

Fixed · RHSA-2021:3811
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS

rh-mysql80-mysql-0:8.0.26-1.el7

Fixed · RHSA-2021:3811
Red Hat Enterprise Linux 6

mysql

Out of support scope
Red Hat Enterprise Linux 7

mariadb

Not affected
Red Hat Enterprise Linux 8

mariadb:10.3/mariadb

Not affected
Red Hat OpenStack Platform 10 (Newton)

mariadb-galera

Not affected
Red Hat OpenStack Platform 13 (Queens)

mariadb

Not affected
Red Hat Software Collections

rh-mariadb103-mariadb

Not affected

Product	Package	State	Advisory
Red Hat Enterprise Linux 8	mysql:8.0-8040020210824134700.522a0ee4	Fixed	RHSA-2021:3590
Red Hat Software Collections for Red Hat Enterprise Linux 7	rh-mysql80-mysql-0:8.0.26-1.el7	Fixed	RHSA-2021:3811
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS	rh-mysql80-mysql-0:8.0.26-1.el7	Fixed	RHSA-2021:3811
Red Hat Enterprise Linux 6	mysql	Out of support scope	n/a
Red Hat Enterprise Linux 7	mariadb	Not affected	n/a
Red Hat Enterprise Linux 8	mariadb:10.3/mariadb	Not affected	n/a
Red Hat OpenStack Platform 10 (Newton)	mariadb-galera	Not affected	n/a
Red Hat OpenStack Platform 13 (Queens)	mariadb	Not affected	n/a
Red Hat Software Collections	rh-mariadb103-mariadb	Not affected	n/a

Remediation

No remediation recorded yet.

Metrics

2.21% 0.02205

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.02205

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (13 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	2.21% (0.02205)	81.92th	v5 (v2026.06.15)
Jun 15, 2026	2.22% (0.02224)	80.33th	v5 (v2026.06.15)
Jul 20, 2024	0.19% (0.00187)	56.52th	v3 (v2023.03.01)
Nov 8, 2023	0.19% (0.00187)	56.03th	v3 (v2023.03.01)
Mar 7, 2023	0.17% (0.00168)	51.76th	v3 (v2023.03.01)
Mar 6, 2023	0.95% (0.00950)	32.28th	v2 (v2022.01.01)
Apr 1, 2022	0.95% (0.00950)	28.61th	v2 (v2022.01.01)
Feb 4, 2022	6.73% (0.06726)	78.88th	v2 (v2022.01.01)
Feb 3, 2022	5.36% (0.05363)	79.74th	v1
Jan 6, 2022	5.36% (0.05363)	79.54th	v1
Jan 5, 2022	1.25% (0.01247)	69.74th	v5 (v2026.06.15)
May 27, 2021	1.25% (0.01247)	0.00th	v1
Apr 14, 2021	1.04% (0.01040)	0.00th	v1

Weaknesses (0)

No CWE recorded.

References (10)

https://access.redhat.com/security/cve/CVE-2021-2001
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1922379
Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CS5THZSGI7O2CZO44NWYE57AG2T7NK3K/
vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7EAHJPWOOF4D6PEFLXW5IQWRRSZ3HRC/
vendor-advisoryx_refsource_FEDORA
https://nvd.nist.gov/vuln/detail/CVE-2021-2001
https://security.gentoo.org/glsa/202105-27
vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://security.netapp.com/advisory/ntap-20210219-0003/
x_refsource_CONFIRMThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2021-2001
https://www.oracle.com/security-alerts/cpujan2021.html
x_refsource_MISCVendor Advisory
https://www.oracle.com/security-alerts/cpujan2021.html#AppendixMSQL

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2021-2001		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1922379		Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CS5THZSGI7O2CZO44NWYE57AG2T7NK3K/		vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7EAHJPWOOF4D6PEFLXW5IQWRRSZ3HRC/		vendor-advisoryx_refsource_FEDORA
https://nvd.nist.gov/vuln/detail/CVE-2021-2001
https://security.gentoo.org/glsa/202105-27		vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://security.netapp.com/advisory/ntap-20210219-0003/		x_refsource_CONFIRMThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2021-2001
https://www.oracle.com/security-alerts/cpujan2021.html		x_refsource_MISCVendor Advisory
https://www.oracle.com/security-alerts/cpujan2021.html#AppendixMSQL