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Windows OLE DB CVE-2026-78441

| EUVDEUVD-2026-73796 MEDIUM
Out-of-bounds Read (CWE-125)
2026-09-08 secure@microsoft.com GHSA-jvcr-r2w7-m2qx
6.5
CVSS 3.1 · Vendor: microsoft
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Severity by source

Vendor (microsoft) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vuln.today AI
6.5 MEDIUM

Network-delivered OLE DB response triggers read; attacker controls server (PR:N) but victim must connect (UI:R); confidentiality-only impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Metadata Corrected
Sep 08, 2026 - 23:40 vuln.today
tag: Buffer Overflow removed
Analysis Generated
Sep 08, 2026 - 22:54 vuln.today
Patch available
Sep 08, 2026 - 18:35 EUVD
CVE Published
Sep 08, 2026 - 18:20 cve.org
MEDIUM 6.5

DescriptionCVE.org

Out-of-bounds read in Windows OLE DB allows an unauthorized attacker to disclose information over a network.

AnalysisAI

Out-of-bounds memory read in the Windows OLE DB component affects Microsoft SQL Server 2017 and 2019, enabling a network-based attacker to disclose sensitive memory contents. Exploitation requires user interaction - specifically, a victim client or application must connect to an attacker-controlled OLE DB data source that delivers a crafted response triggering CWE-125. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires that a victim client or application initiate a connection to an attacker-controlled OLE DB data source - this is the user interaction (UI:R) condition. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 6.5 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) reflects a moderate-to-significant information disclosure risk: network-reachable, low complexity, no privileges on the attacker side, but requiring user interaction. … 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 Vendor-released patch is available. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-78441 vulnerability details – vuln.today

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