Security readout for executives and security teams
Plain-English summary
CVE-2021-2180 is a MySQL Server InnoDB flaw that can let a highly privileged network attacker crash or hang the database. It affects MySQL 5.7.33 and earlier and 8.0.23 and earlier. The impact is availability only, but downtime can be significant for business-critical databases.
Executive priority
Treat as a scheduled priority for database environments, especially systems supporting revenue, authentication, or operational workflows. The privilege requirement lowers likelihood, but the possible complete database outage justifies timely patching and access review.
Technical view
Oracle describes an easily exploitable InnoDB vulnerability reachable over multiple network protocols. Exploitation requires high privileges and no user interaction. Successful exploitation can cause a complete denial of service through a hang or repeatable MySQL Server crash. CVSS is 4.9 with network attack vector, low complexity, high privileges required, and high availability impact.
Likely exposure
Exposure is mainly MySQL Server deployments running 5.7.33 or earlier, or 8.0.23 or earlier, where highly privileged users can connect over network protocols. Risk is higher for business-critical databases and environments with broad DBA or service-account access.
Exploitation context
The source bundle does not show CISA KEV listing, active exploitation, public exploit details, or attacker campaigns. The stated attacker model requires high privileges, so this is more likely an insider, compromised admin account, or over-privileged application credential scenario than unauthenticated internet exploitation.
Researcher notes
The available evidence identifies component, affected versions, privileges, attack vector, and availability impact, but not root cause, vulnerable code path, exploit prerequisites beyond privilege, or fixed package versions. Validate exposure through version and package provenance rather than exploit testing.
Mitigation direction
- Apply Oracle April 2021 CPU guidance or later supported MySQL updates.
- Upgrade MySQL beyond the affected 5.7.33 and 8.0.23 version lines.
- Apply relevant Fedora or Gentoo package advisories for distribution-managed installations.
- Restrict privileged MySQL accounts to trusted hosts and required roles only.
- Monitor database availability and crash events until remediation is complete.
Validation and detection
- Inventory MySQL Server versions across production and non-production environments.
- Confirm no instances remain on 5.7.33 or earlier, or 8.0.23 or earlier.
- Review privileged MySQL accounts with network access.
- Check whether vendor or distribution security updates were applied.
- Review MySQL error logs for unexplained hangs or repeatable crashes.
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-2021-2180 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/cpuapr2021.htmlCVE reference · x_refsource_MISC
- FEDORA-2021-01189f6361CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-5b6c69a73aCVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-b8b7829a83CVE reference · vendor-advisory, x_refsource_FEDORA
- https://security.netapp.com/advisory/ntap-20210513-0002/CVE reference · x_refsource_CONFIRM
- GLSA-202105-27CVE reference · vendor-advisory, x_refsource_GENTOO
- GLSA-202105-28CVE 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.