Security readout for executives and security teams
Plain-English summary
CVE-2020-2806 is a denial-of-service flaw in Oracle MySQL Server. An attacker with low privileges and network access could cause the database to hang or crash repeatedly. The issue affects MySQL Server 5.7.28 and earlier. Business risk is service disruption, not data theft or modification based on the sources.
Executive priority
Prioritize remediation for production databases where downtime would affect revenue, customer access, or operational workflows. This is not a known data-exposure issue from the sources, but reliable database crashes can still create material business disruption.
Technical view
The vulnerability is in MySQL Server's Server: Compiling component. Oracle rates it CVSS 5.3 with network attack vector, high attack complexity, low privileges required, no user interaction, and high availability impact only. The sources do not provide root-cause detail, CWE mapping, or protocol-specific exposure beyond network access via multiple protocols.
Likely exposure
Organizations running Oracle MySQL Server 5.7.28 or earlier are potentially exposed, especially where MySQL is reachable over a network by low-privileged users. Downstream packaged or embedded MySQL deployments may also need vendor-specific checks through NetApp or Gentoo guidance.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. Exploitation is described as difficult and requires low-privileged network access. Successful exploitation can cause a complete denial of service through hangs or frequently repeatable crashes.
Researcher notes
Available public detail is limited. Treat this as an authenticated, high-complexity, network-reachable availability issue in MySQL's compiling path. Avoid assuming confidentiality or integrity impact, exploit availability, or precise trigger conditions unless confirmed by vendor or additional primary sources.
Mitigation direction
- Apply Oracle's April 2020 Critical Patch Update for affected MySQL Server deployments.
- Upgrade MySQL Server beyond affected 5.7.28 and earlier versions using vendor guidance.
- Check downstream advisories for packaged or embedded MySQL exposure.
- Restrict MySQL network access to trusted application hosts and administrators.
- Monitor database availability and crash patterns until patched.
Validation and detection
- Inventory MySQL Server versions and flag 5.7.28 or earlier.
- Confirm whether Oracle, Gentoo, NetApp, or another vendor supplies the deployed package.
- Verify the relevant vendor security update is installed.
- Review MySQL logs and service telemetry for repeated crashes or hangs.
- Confirm network controls limit access to necessary clients only.
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-2020-2806 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
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:L/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:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H1.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpuapr2020.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200416-0003/CVE reference · x_refsource_CONFIRM
- GLSA-202105-27CVE reference · vendor-advisory, x_refsource_GENTOO
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.