Skip to main content

Windows Runtime EUVDEUVD-2026-43947

| CVE-2026-50413 HIGH
Use After Free (CWE-416)
2026-07-14 microsoft GHSA-qwj3-r4r6-v2cr
8.8
CVSS 3.1 · Vendor: microsoft
Share

Severity by source

Vendor (microsoft) PRIMARY
8.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
vuln.today AI
8.8 HIGH

Local low-privilege session required to trigger the use-after-free; scope change reflects crossing to SYSTEM privilege boundary; AC:L as complexity is low per description.

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

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

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

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 20:34 vuln.today
CVE Published
Jul 14, 2026 - 17:07 nvd
HIGH 8.8

DescriptionCVE.org

Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.

AnalysisAI

Privilege escalation in Windows Runtime (WinRT) via a use-after-free memory corruption flaw enables a locally authenticated low-privilege attacker to elevate to SYSTEM-level access on Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025. The CVSS scope change (S:C) confirms the exploit crosses a security boundary, yielding full confidentiality, integrity, and availability impact beyond the originating process. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Gain low-privilege local session
Delivery
Execute crafted WinRT API call sequence
Exploit
Trigger use-after-free in Windows Runtime heap
Execution
Corrupt freed memory region
Persist
Redirect execution flow across privilege boundary
Impact
Achieve SYSTEM-level privilege escalation

Vulnerability AssessmentAI

Exploitation The attacker must hold a low-privilege local authenticated session on the affected system, consistent with CVSS PR:L - a standard domain or local user account is sufficient. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 8.8 rating with vector AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H reflects a locally exploitable, low-complexity vulnerability requiring only standard user privileges with no user interaction - yielding full CIA impact with a scope change. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has obtained a standard user session on a Windows 11 or Server 2025 host - via phishing, credential theft, or an initial access exploit - executes a crafted application that triggers the use-after-free condition in the Windows Runtime subsystem, manipulating freed heap memory to redirect execution and escalate privileges to SYSTEM. No public proof-of-concept code has been identified at time of analysis. …
Remediation Apply the Microsoft-released patch referenced in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50413. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify and enumerate all systems running Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 in your environment. …

Sign in for detailed remediation steps and compensating controls.

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

CVE-2026-49798 CRITICAL POC
9.3 Jul 14

Local privilege escalation in the Microsoft Windows Kernel allows an unauthorized attacker to gain elevated (SYSTEM-leve

CVE-2026-50489 HIGH POC
8.8 Jul 14

Local privilege escalation in the Windows Win32K kernel subsystem (CWE-122 heap-based buffer overflow) lets an already-a

CVE-2026-49795 HIGH POC
8.8 Jul 14

Local privilege escalation in the Windows Kernel lets an already-authenticated attacker corrupt kernel memory via a use-

CVE-2026-54128 HIGH POC
8.4 Jul 14

Local code execution in the Windows DHCP Client service stems from a use-after-free (CWE-416) memory-corruption flaw aff

CVE-2026-54992 HIGH POC
8.4 Jul 14

Local code execution in the Microsoft Message Queuing (MSMQ) Queue Manager affects a broad range of Windows client and s

CVE-2026-50667 HIGH POC
7.8 Jul 14

Elevation of privilege in the Windows NTFS file-system driver lets an already-authenticated local user escalate to SYSTE

CVE-2026-50655 HIGH POC
7.8 Jul 14

Local code execution in the Windows Media component of supported Windows 10, Windows 11, and Windows Server (2016 throug

CVE-2026-50423 HIGH POC
7.8 Jul 14

Local privilege escalation in the Microsoft Windows Kernel allows an already-authenticated attacker to elevate to SYSTEM

CVE-2026-57092 CRITICAL
9.9 Jul 14

Elevation of privilege in the Windows Hyper-V virtual network switch (VMSwitch) lets an authenticated attacker operating

CVE-2026-56188 CRITICAL
9.8 Jul 14

Remote code execution in the Windows Server Network driver stems from a race condition (CWE-362) that lets an unauthoriz

CVE-2026-56190 CRITICAL
9.8 Jul 14

Remote code execution in Microsoft Windows Remote Desktop (RDP) allows an unauthorized network attacker to run arbitrary

CVE-2026-50447 CRITICAL
9.8 Jul 14

Remote code execution in Microsoft Windows Message Queuing (MSMQ) allows an unauthenticated attacker to run arbitrary co

Share

EUVD-2026-43947 vulnerability details – vuln.today

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