EUVD-2026-73317
GHSA-r6qg-cj8h-f89v
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable heap overflow exploitable by any authenticated SQL Server login with low complexity; full C/I/A impact consistent with code execution in 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 2022 and 2025 allows a low-privileged, network-authenticated attacker to achieve remote code execution against the database engine. The vulnerability is reachable over the network with low complexity, requiring only a valid SQL Server login - no elevated privileges or user interaction. …
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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 minimum low-privileged access to the target SQL Server instance - unauthenticated exploitation is not supported by the CVSS PR:L vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects the core threat model: any user with a valid SQL Server login on an exposed instance can potentially trigger the overflow over the network with low complexity and achieve full host-level or engine-level 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 | Vendor-released patches are available across all four affected servicing branches. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Audit your environment to identify all SQL Server 2022 and 2025 instances and verify current patch levels against Microsoft security bulletins. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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