Security readout for executives and security teams
Plain-English summary
This is a MySQL Server denial-of-service vulnerability. A highly privileged attacker who can reach MySQL over the network could cause the server to hang or crash repeatedly. The main business risk is database downtime, not data theft or modification based on the cited CVSS impact.
Executive priority
Treat as a moderate availability risk. Prioritize remediation for business-critical databases, externally reachable environments, or systems with broad privileged user access.
Technical view
CVE-2021-2440 affects Oracle MySQL Server 8.0.25 and prior in the Server:DML component. It is rated CVSS 4.9 with network attack vector, low complexity, high privileges required, no user interaction, unchanged scope, and high availability impact only.
Likely exposure
Exposure is most likely where MySQL Server 8.0.25 or earlier is still running and privileged database users can connect over network-accessible protocols.
Exploitation context
The sources describe the issue as easily exploitable after high-privilege network access. The CVE is not listed as KEV, and the supplied sources do not establish active exploitation.
Researcher notes
The vulnerability is availability-only in the supplied CVSS vector. Evidence does not include a CWE, exploit details, or product-specific NetApp impact details beyond the advisory reference.
Mitigation direction
- Apply Oracle's July 2021 CPU guidance or later supported MySQL security updates.
- Check appliance or software vendors for bundled MySQL exposure and fixes.
- Restrict MySQL network access to trusted hosts and required services only.
- Review and minimize high-privilege MySQL accounts.
- Monitor MySQL availability and crash patterns until remediation is complete.
Validation and detection
- Inventory MySQL Server versions and flag 8.0.25 or earlier.
- Confirm whether MySQL is reachable over any network protocol.
- Review privileged account assignments and remove unnecessary access.
- Check vendor advisories for third-party products bundling MySQL.
- Verify patched systems are no longer on affected versions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-2440 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H1.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpujul2021.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210723-0001/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.