EUVD-2026-73389
GHSA-3x5q-47j3-8fw5
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable heap overflow requiring only a low-privilege SQL Server credential; PR:L reflects mandatory authentication barrier; full C/I/A reflects RCE capability with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.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 2025 allows a network-authenticated low-privileged attacker to achieve remote code execution against affected database instances. Both the GDR servicing branch (below 17.0.1135.8) and the CU8 cumulative update branch (below 17.0.4085.5) are vulnerable. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid SQL Server 2025 login with at minimum basic connection privileges, as confirmed by the CVSS PR:L metric and the description's 'authorized attacker' framing. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 base score reflects a network-exploitable vulnerability with low authentication bar and full confidentiality, integrity, and availability impact (C:H/I:H/A:H). … 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 | Microsoft has released patches for both affected servicing branches. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and catalog all Microsoft SQL Server 2025 instances currently deployed, documenting their current patch levels across both GDR and CU8 servicing branches. …
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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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