EUVD-2026-73381
GHSA-p7jh-8q9g-vggh
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-accessible SQL Server listener, low-privilege authenticated session required (PR:L), no complexity or interaction barriers, full impact on database host.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in SQL Server allows an authorized attacker to execute code over a network.
AnalysisAI
Use-after-free memory corruption in Microsoft SQL Server enables a network-authenticated low-privileged attacker to achieve arbitrary code execution with full confidentiality, integrity, and availability impact. Affected versions span all actively serviced SQL Server releases from 2017 through 2025, across both Cumulative Update (CU) and General Distribution Release (GDR) servicing branches. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid SQL Server login credential - any authenticated database user account suffices, including low-privileged application accounts. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H yields a base score of 8.8, reflecting the primary risk correctly: network-reachable exploitation requires only a valid SQL Server credential (PR:L), which is attainable through credential theft, brute force, or insider threat. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patches via the Microsoft Update Catalog or SQL Server Update Center: upgrade SQL Server 2017 CU31 to 14.0.3550.4 or later, SQL Server 2017 GDR to 14.0.2130.4 or later; upgrade SQL Server 2019 CU32 to 15.0.4490.9 or later, SQL Server 2019 GDR to 15.0.2190.7 or later; upgrade SQL Server 2022 CU26 to 16.0.4275.2 or later, SQL Server 2022 GDR to 16.0.1200.5 or later; upgrade SQL Server 2025 CU8 to 17.0.4085.5 or later, SQL Server 2025 GDR to 17.0.1135.8 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all SQL Server instances running versions 2017, 2019, 2022, and 2025 across both CU and GDR servicing tracks; document which systems accept remote authentication and which user roles have database access. …
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Same weakness CWE-416 – Use After Free
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External POC / Exploit Code
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