What is the CVSS score of EUVD-2026-22423?

EUVD-2026-22423 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Microsoft are affected by EUVD-2026-22423?

CVE-2026-26180 is a high-severity local privilege escalation vulnerability affecting Windows 10, Windows 11, and Windows Server across 21 versions.. A patch is available.

How to fix or mitigate EUVD-2026-22423?

Within 24 hours: Identify all affected Windows 10 (1607-22H2), Windows 11 (22H3-26H1), and Windows Server (2012-2025) systems in your environment. Within 7 days: Deploy Microsoft's released security patch to all affected devices via Windows Update or WSUS; prioritize domain controllers, administrative workstations, and servers hosting sensitive data. Within 30 days: Complete patch deployment across all remaining systems and verify remediation through vulnerability scanning.

Microsoft EUVD-2026-22423

| CVE-2026-26180 HIGH

Heap-based Buffer Overflow (CWE-122)

2026-04-14 microsoft

GHSA-c95w-cq44-cgc5

Heap Overflow Buffer Overflow Microsoft

7.8

CVSS 3.1 · NVD

Temporal: 6.8

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

ENISA EUVD

HIGH

qualitative

CIRCL (temporal)

6.8 MEDIUM

cvss

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 17, 2026 - 15:22 vuln.today

cvss_changed

Analysis Generated

Apr 14, 2026 - 19:14 vuln.today

EUVD ID Assigned

Apr 14, 2026 - 17:46 euvd

EUVD-2026-22423

Analysis Generated

Apr 14, 2026 - 17:46 vuln.today

Patch released

Apr 14, 2026 - 17:46 nvd

Patch available

CVE Published

Apr 14, 2026 - 16:57 nvd

HIGH 7.8

DescriptionCVE.org

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

AnalysisAI

Heap-based buffer overflow in the Windows Kernel enables local privilege escalation to SYSTEM on Windows 10 (versions 1607 through 22H2), Windows 11 (versions 22H3 through 26H1), and Windows Server (2012 through 2025). Authenticated local attackers with low privileges can exploit this memory corruption vulnerability to gain complete system control. Microsoft has released patches addressing 21 affected product versions. No public exploit identified at time of analysis, though the local attack vec

Technical ContextAI

This vulnerability affects the Windows Kernel's heap memory management, specifically a CWE-122 heap-based buffer overflow condition. The kernel is the core privileged component of Windows that manages system resources, memory, and process execution. A heap overflow occurs when data written to a dynamically allocated memory buffer exceeds its boundaries, corrupting adjacent memory structures. In kernel space, this corruption can be leveraged to overwrite critical data structures or function pointers, enabling arbitrary code execution at the highest privilege level (SYSTEM/Ring 0). The vulnerability spans an exceptionally wide range of Windows versions from legacy Server 2012 (kernel 6.2) through the latest Windows 11 26H1 and Server 2025 (kernel 10.0.28000), indicating the flaw exists in core kernel code shared across multiple release branches over more than a decade of Windows development.

RemediationAI

Apply Microsoft security updates immediately through Windows Update or WSUS to upgrade affected systems to patched builds. For Windows 10 version 1607, upgrade to build 10.0.14393.9060 or later. For Windows 10 versions 1809 and Server 2019, upgrade to 10.0.17763.8644 or later. Windows 10 21H2 requires build 10.0.19044.7184 or later, while 22H2 requires 10.0.19045.7184. Windows 11 22H3 and 23H2 users must upgrade to 10.0.22631.6936, Windows 11 24H2 and Server 2025 to 10.0.26100.32690, Windows 11 25H2 to 10.0.26200.8246, and Windows 11 26H1 to 10.0.28000.1836. Server 2012 requires 6.2.9200.26026, Server 2012 R2 requires 6.3.9600.23132, Server 2016 requires 10.0.14393.9060, Server 2022 requires 10.0.20348.5020, and Server 2022 23H2 Edition requires 10.0.25398.2274. Prioritize patching systems accessible to lower-privileged users or in multi-tenant environments. No effective workarounds exist for kernel-level memory corruption vulnerabilities. Complete advisory and update packages available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26180.