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CVE-2021-2425

19
FAUCET Score

CVE-2021-2425 is a vulnerability in the Optimizer component of Oracle MySQL Server, affecting versions 8.0.25 and prior. This flaw allows a highly privileged attacker with network access to cause a complete denial of service (DoS) by repeatedly crashing the MySQL Server. The vulnerability has a CVSS 3.1 Base Score of 4.9 (Medium), indicating a low attack complexity and requiring high privileges for exploitation. Successful attacks primarily impact availability, leading to a system hang or frequent crashes. Currently, there is no evidence of active exploitation, nor is there publicly available exploit code in Metasploit or ExploitDB. Community discussion and media coverage for this CVE are minimal, which is typical for the majority of vulnerabilities.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.0.0, <= 8.0.25CPE matchmatch criteria
cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*

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
2.09%
Probability of exploitation in next 30 days
EPSS Percentile
79.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0209 is in the 88th percentile among its peer group of 3,562 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

No media coverage found for this CVE.

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 (4)

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 7Fixed in: rh-mysql80-mysql-0:8.0.26-1.el7
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 (1)

redhatCVE-2021-2425Moderate

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

Jul 20, 2021

References

security.netapp.com / advisory/ntap-20210723-0001
Third Party Advisory
oracle.com / security-alerts/cpujul2021.html
Vendor Advisory