EUVD-2026-73787
GHSA-969q-58jf-4f5x
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only access (AV:L), authenticated low-privilege user required (PR:L), race condition complexity (AC:H), scope unchanged as escalation stays within SQL Server process (S:U).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in SQL Server allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft SQL Server affects versions 2017 through 2025 via a use-after-free memory corruption flaw exploitable by an authenticated low-privilege user. An attacker with existing local access and SQL Server login credentials can trigger the UAF condition to achieve full C:H/I:H/A:H impact, effectively gaining elevated privileges on the host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) local access to the system running SQL Server (AV:L - remote network exploitation is not possible); (2) a valid SQL Server login with at minimum low-level database privileges (PR:L - unauthenticated access does not satisfy this); (3) successful exploitation of a high-complexity condition such as a heap race (AC:H - a simple, reliable one-shot exploit is unlikely). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 base score reflects real-world constraints: AV:L requires the attacker to already have local access to the system running SQL Server, PR:L requires an authenticated SQL Server login, and AC:H indicates exploitation is not straightforward - a race condition or specific heap state must be achieved. … 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 security updates released by Microsoft across all affected SQL Server versions and servicing channels. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, enumerate all SQL Server 2017-2025 instances in your environment and document which are accessible to database users or exposed in multi-tenant scenarios. …
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Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
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External POC / Exploit Code
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