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Severity by source

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

Description states unauthenticated network information disclosure, so AV:N/PR:N/UI:N; impact is confidentiality-only (C:H) with no integrity or availability effect.

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

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 20:14 vuln.today
CVE Published
Jul 14, 2026 - 17:07 nvd
HIGH 7.5

DescriptionCVE.org

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

AnalysisAI

Information disclosure in the Windows Kernel allows a remote, unauthenticated attacker to read out-of-bounds memory and leak sensitive data across all currently supported Windows client and server builds (Windows 10 1809/21H2/22H2, Windows 11 24H2/25H2/26H1, and Windows Server 2019/2022/2025). The CVSS 3.1 base score is 7.5 (AV:N/AC:L/PR:N/UI:N, high confidentiality impact only). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Reach affected Windows host over network
Delivery
Send crafted request to kernel service
Exploit
Trigger out-of-bounds read in kernel
Execution
Kernel returns adjacent memory
Impact
Extract leaked sensitive data

Vulnerability AssessmentAI

Exploitation Per CVSS AV:N/AC:L/PR:N/UI:N, exploitation requires no authentication, no user interaction, and only network reachability to the affected Windows Kernel service on a supported build (Windows 10 1809/21H2/22H2, Windows 11 24H2/25H2/26H1, or Windows Server 2019/2022/2025). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals are moderately consistent but incomplete. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with network access to an affected Windows host sends crafted traffic to a kernel-serviced endpoint that triggers the out-of-bounds read, causing the kernel to return adjacent memory contents in a response or observable side channel. Repeating the request lets the attacker harvest sensitive memory such as pointers or secrets, potentially bypassing address-space randomization to enable follow-on attacks. …
Remediation Apply the Microsoft security update for CVE-2026-50463; the vendor advisory confirms a patch is available, and the exact fixed build numbers per SKU should be taken directly from Microsoft's Security Update Guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50463 (specific fixed version not enumerated in the supplied data, so do not substitute an assumed build). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify and document all Windows 10, 11, 2019, 2022, and 2025 systems in your environment, confirming patch availability and deployment constraints. …

Sign in for detailed remediation steps and compensating controls.

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

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CVE-2026-50463 vulnerability details – vuln.today

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