HOME VULNERABILITIESCVE-2021-2011

MEDIUM

CVE-2021-2011

NVD-CWE-noinfoPublished: January 20, 2021· Updated: Jun 17, 2026

5.9

CVSS v3.1

Official Description

Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are affected are 5.7.32 and prior and 8.0.22 and prior. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Client. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Client. CVSS 3.1 Base Score 5.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).

Technical Analysis

CVE-2021-2011 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.9.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Fedora1 product(s)

fedora

mariadb1 product(s)

mariadb

netapp3 product(s)

active iq unified manageroncommand insightoncommand workflow automation

Oracle1 product(s)

mysql

Source: NVD CPE · 7 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://security.gentoo.org/glsa/202105-27

ADVISORYhttps://security.netapp.com/advisory/ntap-20210622-0001/

ADVISORYhttps://www.oracle.com/security-alerts/cpujan2021.html

ADVISORYhttps://security.gentoo.org/glsa/202105-27

ADVISORYhttps://security.netapp.com/advisory/ntap-20210622-0001/

ADVISORYhttps://www.oracle.com/security-alerts/cpujan2021.html

All References (10)

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CS5THZSGI7O2CZO44NWYE57AG2T7NK3K/

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7EAHJPWOOF4D6PEFLXW5IQWRRSZ3HRC/

→

https://security.gentoo.org/glsa/202105-27Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20210622-0001/Third Party Advisory

→

https://www.oracle.com/security-alerts/cpujan2021.htmlVendor Advisory

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CS5THZSGI7O2CZO44NWYE57AG2T7NK3K/

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7EAHJPWOOF4D6PEFLXW5IQWRRSZ3HRC/

→

https://security.gentoo.org/glsa/202105-27Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20210622-0001/Third Party Advisory

→

https://www.oracle.com/security-alerts/cpujan2021.htmlVendor Advisory

Quick Facts

CVE IDCVE-2021-2011

CVSS Score5.9 / 10

SeverityMEDIUM

WeaknessNVD-CWE-noinfo

CISA KEVNo

Affected4 vendor(s)

PublishedJan 20, 2021

Related CVEs (NVD-CWE-noinfo)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2021-2011 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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