EUVD-2026-73175
GHSA-hgrm-pmmm-4685
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-reachable pre-auth heap overflow yields full RCE; UI:R is the sole constraint limiting score below 9.8; all impact dimensions high.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in Microsoft SQL Server 2017 and 2019 enables unauthenticated network attackers to execute arbitrary code on the database host with high impact across confidentiality, integrity, and availability. The flaw (CWE-122) is reachable without credentials over the network, though user interaction is required per the vendor CVSS vector (UI:R), placing the CVSS base score at 8.8. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector (AV:N/AC:L/PR:N/UI:R) indicates that network access to the SQL Server listener is required with no authentication to the database engine, but a user interaction event must be triggered - the exact nature of this interaction is not specified in the available advisory data, and may involve a connected client application processing a crafted server response or executing a specific SQL workflow. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score reflects a genuine high-severity finding: network-reachable, unauthenticated, low-complexity exploitation with full C/I/A impact, held below 9.8 only by the UI:R user-interaction requirement. … 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 all affected servicing branches. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Microsoft SQL Server 2017 and 2019 instances in your environment and assess which are directly exposed to network access, prioritizing systems processing sensitive data. …
Sign in for detailed remediation steps and compensating controls.
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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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