EUVD-2026-73782
GHSA-qq9g-q5hv-pfjw
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-accessible via standard SQL port with only a low-privilege credential required; full C/I/A impact reflects potential escalation to sysadmin-level control.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Improper access control in SQL Server allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation in Microsoft SQL Server 2017 through 2025 allows a low-privileged authenticated attacker to elevate to higher database or system-level permissions over a standard network connection. The flaw, rooted in CWE-284 (Improper Access Control), requires only a valid low-privilege SQL Server login and network reachability to the instance - no special configuration or user interaction is needed. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must possess a valid SQL Server login with at minimum public-role or equivalent low-privilege access to the target instance. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score is well-supported: AV:N reflects network exploitation, AC:L indicates no special attack conditions beyond a valid login, PR:L confirms a low-privilege account is required (not unauthenticated), and the C:H/I:H/A:H triad reflects the potential for full database or host-level compromise upon successful privilege escalation. … 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 from the Microsoft Security Response Center at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-73028. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Microsoft SQL Server 2017 through 2025 instances across the organization and verify which instances have network connectivity or low-privilege user accounts. …
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Same weakness CWE-284 – Improper Access Control
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External POC / Exploit Code
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