CVE-2026-54124: Windows Terminal Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Jul

Released

2026-07-14

Description

Integer overflow or wraparound in Windows Terminal allows an unauthorized attacker to execute code locally.

Affected Products (17)

Windows

• Windows Server 2022
• Windows 10 Version 21H2 for 32-bit Systems
• Windows 10 Version 21H2 for ARM64-based Systems
• Windows 10 Version 21H2 for x64-based Systems
• Windows Server 2025 (Server Core installation)
• Windows 11 Version 25H2 for ARM64-based Systems
• Windows 11 Version 25H2 for x64-based Systems
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows 11 Version 24H2 for x64-based Systems
• Windows Server 2025
• Windows 11 version 26H1 for x64-based Systems
• Windows 11 Version 26H1 for ARM64-based Systems

ESU

• Windows 10 Version 22H2 for x64-based Systems
• Windows 10 Version 22H2 for ARM64-based Systems
• Windows 10 Version 22H2 for 32-bit Systems

Apps

• Windows Terminal for Windows 10
• Windows Terminal for Windows 11

Security Updates (7)

• 5099540
• 5099539
• Release Notes
• 5099536
• 5101650
• 5095051
• 5101649

Acknowledgments

<a href="https://x.com/randomdhiraj">Dhiraj Mishra</a>, <a href="https://www.linkedin.com/in/danielr1123/">Daniel R</a>

Revision History

• 2026-07-14: Information published.