EUVD-2026-73391
GHSA-pqhh-6372-c5r4
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-accessible via SQL protocol; low credential sufficient; heap overflow yields full code execution; no scope change beyond the SQL Server process.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in Microsoft SQL Server (2017 through 2025) enables network-reachable, low-privileged authenticated attackers to execute arbitrary code on the database server. With CVSS 8.8 (AV:N/AC:L/PR:L/UI:N), exploitation requires only a valid database login - no administrative privileges or user interaction - making this a credible lateral-movement vector in environments with reachable SQL Server instances. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid SQL Server login with at least low-level database privileges (PR:L per CVSS vector); no administrative or sysadmin role is needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score with AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H reflects a high real-world risk: the attack path is network-accessible at low complexity, requires only a low-privileged SQL Server credential, and achieves full confidentiality, integrity, and availability compromise. … 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 patch for the applicable SQL Server version and servicing track: SQL Server 2017 GDR → upgrade to 14.0.2130.4; SQL Server 2017 CU 31 → upgrade to 14.0.3550.4; SQL Server 2019 GDR → upgrade to 15.0.2190.7; SQL Server 2019 CU 32 → upgrade to 15.0.4490.9; SQL Server 2022 GDR → upgrade to 16.0.1200.5; SQL Server 2022 CU 26 → upgrade to 16.0.4275.2; SQL Server 2025 GDR → upgrade to 17.0.1135.8; SQL Server 2025 CU 8 → upgrade to 17.0.4085.5. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of all Microsoft SQL Server instances running versions 2017 through 2025, including on-premises, cloud, and hybrid deployments, and identify those with network accessibility. …
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External POC / Exploit Code
Leaving vuln.today