EUVD-2026-73824
GHSA-x655-787w-f787
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
PR:L confirmed by description ('authorized attacker'); AV:N and AC:L match standard network-reachable heap overflow; full C/I/A:H for code execution.
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 (versions 2017 through 2025) enables any authenticated network attacker holding a low-privileged SQL Server account to achieve full remote code execution on the database host. The CVSS vector (AV:N/AC:L/PR:L/UI:N) confirms exploitation requires no user interaction and is low-complexity once a valid login is held, with complete confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid SQL Server account with at least public/low-level privileges (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 High is well-justified here: AV:N eliminates physical or local-only exposure, AC:L means no special timing or conditions are required, and PR:L is the primary mitigating factor - an attacker must possess at least a low-privileged SQL Server account before exploitation. … 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 across all affected servicing branches. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all SQL Server deployments across versions 2017-2025 and identify which instances currently lack patches. …
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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
Leaving vuln.today