CVE-2026-78442

Heap-based buffer overflow in Windows OLE DB allows an unauthorized attacker to execute code over a network.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78442	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:microsoft:sql_server_2017:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2017:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2019:::::::x64:*
	cpe:2.3:a:microsoft:sql_server_2019:::::::x64:*

History

23 Sep 2026, 15:36

Type	Values Removed	Values Added
First Time		Microsoft sql Server 2019 Microsoft Microsoft sql Server 2017
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78442 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78442 - Vendor Advisory, Patch
CPE		cpe:2.3:a:microsoft:sql_server_2019:::::::x64:* cpe:2.3:a:microsoft:sql_server_2017:::::::x64:*

Information

Published : 2026-09-08 18:20

Updated : 2026-09-23 15:36

NVD link : CVE-2026-78442

Mitre link : CVE-2026-78442

CVE.ORG link : CVE-2026-78442

JSON object : View

Products Affected

microsoft

sql_server_2019
sql_server_2017

CWE

CWE-122

Heap-based Buffer Overflow

{"id": "CVE-2026-78442", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-78442", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-04T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Microsoft SQL Server 2017 (CU 31)", "versions": [{"status": "affected", "version": "14.0.0", "lessThan": "14.0.3550.4", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft SQL Server 2017 (GDR)", "versions": [{"status": "affected", "version": "14.0.0", "lessThan": "14.0.2130.4", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft SQL Server 2019 (CU 32)", "versions": [{"status": "affected", "version": "15.0.0.0", "lessThan": "15.0.4490.9", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft SQL Server 2019 (GDR)", "versions": [{"status": "affected", "version": "15.0.0", "lessThan": "15.0.2190.7", "versionType": "custom"}], "platforms": ["x64-based Systems"]}]}], "published": "2026-09-08T18:20:42.020", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78442", "tags": ["Vendor Advisory", "Patch"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-122"}]}], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow in Windows OLE DB allows an unauthorized attacker to execute code over a network."}], "lastModified": "2026-09-23T15:36:54.890", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:sql_server_2017:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "3207B09A-49E7-43D5-88B6-6ECF886B2E96", "versionEndExcluding": "14.0.2130.4"}, {"criteria": "cpe:2.3:a:microsoft:sql_server_2017:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "E409F829-1995-4F4F-9103-F718E929C482", "versionEndExcluding": "14.0.3550.4", "versionStartIncluding": "14.0.3006.16"}, {"criteria": "cpe:2.3:a:microsoft:sql_server_2019:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "799073C2-2213-4F34-8F07-D6C10AC00578", "versionEndExcluding": "15.0.2190.7"}, {"criteria": "cpe:2.3:a:microsoft:sql_server_2019:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "97DF0D00-9830-4818-9BC0-932A451F7228", "versionEndIncluding": "15.0.4490.9", "versionStartIncluding": "15.0.4003.23"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}