EUVD-2026-73383
GHSA-9v73-pr97-vpq7
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-accessible heap overflow requiring only low-privilege credentials; code execution yields full confidentiality, integrity, and availability impact with no scope change.
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 enables a low-privileged authenticated attacker to remotely execute arbitrary code on the database server. All major active SQL Server branches are affected - 2017, 2019, 2022, and the newly released 2025 edition - across both Cumulative Update (CU) and General Distribution Release (GDR) servicing tracks. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid SQL Server credential at minimum low-privilege level (PR:L per CVSS) - this can be a SQL authentication login, a Windows/AD account with SQL Server access, or any application-tier credential with a SQL Server role assignment. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score reflects a network-accessible (AV:N), low-complexity (AC:L) vulnerability requiring only low-privilege authentication (PR:L) with no user interaction. … 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 vendor-released patches immediately for each installed SQL Server branch and servicing track. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Microsoft SQL Server instances in production and non-production environments, identifying versions 2017, 2019, 2022, and 2025 across all Cumulative Update and General Distribution Release tracks. …
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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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