CVE-2024-21009: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.36 and prior and 8.3.0 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4
CSIRTS triage
- What
- A vulnerability in the Server Optimizer component allows a high privileged attacker to cause a denial of service via network access.
- Who is affected
- All deployments of MySQL Server 8.0.36 and earlier or 8.3.0 and earlier are affected.
- Urgency
- Medium priority; not yet exploited in the wild, but requires high privilege to exploit.
- Action
- Update MySQL Server to a patched version beyond 8.0.36 or 8.3.0.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21009
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Moderate exploitation riskCVE-2024-210091.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 63% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2024-21009 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for MySQL Server product
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2025-21566: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supp…msrc · 2026-08-06
- mediumCVE-2025-21493: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: Privil…msrc · 2026-08-06
- mediumCVE-2025-21500: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supp…msrc · 2026-08-06
- mediumCVE-2025-21543: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Packaging). Supp…msrc · 2026-08-06
- mediumCVE-2024-21060: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Data Dictionary)…msrc · 2026-08-06
- mediumCVE-2025-21497: Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versi…msrc · 2026-08-06
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