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Δ / VULNERABILITY RECORD

CVE-2025-21490.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSMEDIUM / 4.9No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Aug 12, 2026

Disclosure summary

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.40 and prior, 8.4.3 and prior and 9.1.0 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Source-reported weakness categories

CWE-770

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2025-Jan

Open original source · Updated Aug 12, 2026

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.40 and prior, 8.4.3 and prior and 9.1.0 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

Microsoft maximum product score: 4.9

VendorProduct / associationVersion / bounds
Microsoft update guidecbl2 mysql 8.0.40-4 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 mariadb 10.6.20-1 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 mysql 8.0.40-4 on CBL-Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 mariadb 10.6.20-1 on CBL-Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 mariadb 10.6.21-1 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guidecbl2 mysql 8.0.41-1 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guideazl3 mariadb 10.11.11-1 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guideazl3 mariadb 10.11.10-1 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 mariadb 10.6.20-1 on CBL Mariner 2.0 (MSRC status code 3)

Vendor remediation references

  • CBL-Mariner Releases · build 8.0.41-1 · product IDs 19825-17086, 19825-21692, 17153-16823
  • Vendor guidance · product IDs 19825-17086, 19825-21692, 17153-16823
  • CBL-Mariner Releases · build 10.6.21-1 · product IDs 20206-17086, 17231-21692, 19282-16823, 17231-17086
  • Vendor guidance · product IDs 20206-17086, 17231-21692, 19282-16823, 17231-17086
  • CBL-Mariner Releases · build 10.11.11-1 · product IDs 19283-17084, 17616-17084
  • Vendor guidance · product IDs 19283-17084, 17616-17084

Original records & references

PUBLISHED 2025-03-26T20:00:00-04:00
MODIFIED 2026-08-12T19:39:18-04:00
INGESTED 2026-10-08T12:50:16-04:00