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CVE-2021-2002

20
FAUCET Score

CVE-2021-2002 is a medium-severity vulnerability affecting Oracle MySQL Server versions 8.0.22 and prior, specifically within the Server: Replication component. This easily exploitable flaw allows a highly privileged attacker with network access to cause a complete denial of service (DoS) by crashing the MySQL Server. While no public exploit code or active exploitation has been observed, the vulnerability has garnered some community discussion and media coverage, including a mention in an article about the HelloKitty ransomware.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.0.0, <= 8.0.22CPE matchmatch criteria
cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.61%
Probability of exploitation in next 30 days
EPSS Percentile
83.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0261 is in the 94th percentile among its peer group of 3,563 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (16)

microsoftpatch availablevia msrc
Product: mysql-debuginfo-8.0.26-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: mysql-8.0.26-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: mysql-devel-8.0.26-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: 12990-12137Fixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: 12991-12138Fixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: 12992-12138Fixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: 12993-12138Fixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: 12988-12137Fixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: mysql-debuginfo-8.0.26-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: 12989-12137Fixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: mysql-8.0.26-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 8.0.26-1
microsoftpatch availablevia msrc
Product: mysql-devel-8.0.26-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 8.0.26-1
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-mysql80-mysql-0:8.0.26-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: mysql:8.0-8040020210824134700.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-mysql80-mysql-0:8.0.26-1.el7
View patch
oraclevendor investigatingvia nvd_reference
View patch

Vendor Advisories (2)

redhatCVE-2021-2002Moderate

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

Jan 19, 2021
microsoft2021-Jan/CVE-2021-2002

MySQL Server Replication Vulnerability Allows High-Privileged Remote Attackers to Cause Denial of Service (DoS) in Versions 8.0.22 and Earlier

Jan 12, 2021

References

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/CS5THZSGI7O2CZO44NWYE57AG2T7NK3K
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/T7EAHJPWOOF4D6PEFLXW5IQWRRSZ3HRC
security.gentoo.org / glsa/202105-27
Third Party Advisory
security.netapp.com / advisory/ntap-20210219-0003
Third Party Advisory
oracle.com / security-alerts/cpujan2021.html
Vendor Advisory