CVE-2025-21497

mediumCVSS 5.5covered by 1 sourcefirst seen 2026-08-06

CSIRTS triage

vendor: Oracle product: MySQL Server Privilege escalationaffected: 8.0.40 and prior, 8.4.3 and prior, 9.1.0 and prior

What: Vulnerability in InnoDB component allowing high-privileged attacker to cause unspecified impact via multiple protocols.
Who is affected: MySQL Server deployments version 8.0.40, 8.4.3, or 9.1.0 and earlier accessible via network.
Urgency: Medium severity (CVSS 5.5) requiring high privilege but affecting core database; apply promptly.
Action: Upgrade MySQL Server to versions after 8.0.40, 8.4.3, or 9.1.0 respectively.

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Low exploitation risk0.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all EPSS-scored CVEs.

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