CVE-2026-21247

HIGH
2026-02-10 [email protected]
7.3
CVSS 3.1
Share

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:02 vuln.today
CVE Published
Feb 10, 2026 - 18:16 nvd
HIGH 7.3

Tags

Windows Hyper V Windows 11 24h2 Windows 10 22h2 Windows Server 2022 Windows 10 21h2 Windows Server 2025 Windows 11 23h2 Windows Server 2022 23h2 Windows Server 2016 Windows 10 1809 Windows Server 2019 Windows 11 25h2 Windows 10 1607 Microsoft

Description

Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally.

Analysis

Improper input validation in Windows Hyper-V allows an authorized attacker to execute code locally. [CVSS 7.3 HIGH]

Sign in for full analysis, threat intelligence, and remediation guidance.

Remediation

Within 24 hours: Identify and inventory all systems running Hyper-V, assess exposure in production environments, and establish incident response readiness. Within 7 days: Implement network segmentation to restrict local access to Hyper-V hosts, review and enforce principle of least privilege for user accounts with host-level permissions, and disable non-essential Hyper-V features if operationally feasible. …

Sign in for detailed remediation steps.

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Sign in - Free

Priority Score

37
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +36
POC: 0

Share

CVE-2026-21247 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy