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Vulnerability details: VCID-1dhk-696g-aaaq
Vulnerability ID VCID-1dhk-696g-aaaq
Aliases CVE-2021-2166
Summary Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions that are affected are 5.7.33 and prior and 8.0.23 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).
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-2166.html
rhas Moderate https://access.redhat.com/errata/RHSA-2021:3590
rhas Moderate https://access.redhat.com/errata/RHSA-2021:3811
rhas Moderate https://access.redhat.com/errata/RHSA-2022:1007
rhas Moderate https://access.redhat.com/errata/RHSA-2022:1010
rhas Moderate https://access.redhat.com/errata/RHSA-2022:1556
rhas Moderate https://access.redhat.com/errata/RHSA-2022:1557
rhas Moderate https://access.redhat.com/errata/RHSA-2022:4818
cvssv3 4.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-2166.json
generic_textual Medium https://access.redhat.com/security/cve/CVE-2021-2166
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-2166
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epss 0.01232 https://api.first.org/data/v1/epss?cve=CVE-2021-2166
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1951755
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-2166
cvssv3.1 4.9 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2021-2166
cvssv3 4.9 https://nvd.nist.gov/vuln/detail/CVE-2021-2166
archlinux Medium https://security.archlinux.org/AVG-1882
generic_textual Medium https://ubuntu.com/security/notices/USN-4952-1
generic_textual Medium https://ubuntu.com/security/notices/USN-5022-3
generic_textual Medium https://www.oracle.com/security-alerts/cpuapr2021.html
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-2166.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-2166.json
https://access.redhat.com/security/cve/CVE-2021-2166
https://api.first.org/data/v1/epss?cve=CVE-2021-2166
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-2166
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AKV7TRUEQW6EV45RSZVVFLVQMNHVHBCJ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPA3CTGXPVWKHMCQDVURK4ETH7GE34KK/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GAU7KW36A6TQGKG3RUITYSVUFIHBY3OT/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJQRPXNDH6YHQLUSCS5VA7DAW32PN7N7/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEF5CRATUGQZUSQU63MHQIDZPOLHW2VE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJVUTKKFQAWR7NURCQHQQ5JHTVYGEOYQ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AKV7TRUEQW6EV45RSZVVFLVQMNHVHBCJ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DPA3CTGXPVWKHMCQDVURK4ETH7GE34KK/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GAU7KW36A6TQGKG3RUITYSVUFIHBY3OT/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JJQRPXNDH6YHQLUSCS5VA7DAW32PN7N7/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PEF5CRATUGQZUSQU63MHQIDZPOLHW2VE/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJVUTKKFQAWR7NURCQHQQ5JHTVYGEOYQ/
https://security.gentoo.org/glsa/202105-27
https://security.gentoo.org/glsa/202105-28
https://security.netapp.com/advisory/ntap-20210513-0002/
https://ubuntu.com/security/notices/USN-4952-1
https://ubuntu.com/security/notices/USN-5022-3
https://www.oracle.com/security-alerts/cpuapr2021.html
1951755 https://bugzilla.redhat.com/show_bug.cgi?id=1951755
987325 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=987325
ASA-202105-14 https://security.archlinux.org/ASA-202105-14
AVG-1882 https://security.archlinux.org/AVG-1882
cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-2166 https://nvd.nist.gov/vuln/detail/CVE-2021-2166
RHSA-2021:3590 https://access.redhat.com/errata/RHSA-2021:3590
RHSA-2021:3811 https://access.redhat.com/errata/RHSA-2021:3811
RHSA-2022:1007 https://access.redhat.com/errata/RHSA-2022:1007
RHSA-2022:1010 https://access.redhat.com/errata/RHSA-2022:1010
RHSA-2022:1556 https://access.redhat.com/errata/RHSA-2022:1556
RHSA-2022:1557 https://access.redhat.com/errata/RHSA-2022:1557
RHSA-2022:4818 https://access.redhat.com/errata/RHSA-2022:4818
USN-4952-1 https://usn.ubuntu.com/4952-1/
USN-5022-3 https://usn.ubuntu.com/5022-3/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-2166.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-2166
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-2166
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.19859
EPSS Score 0.00062
Published At May 1, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.